第一篇：名詞性從句 例句

英語寫作提高——名詞性從句例句 一．主語從句

1、Who was responsible for the accident is not yet clear.2、Why he left so abruptly is not known to any of us.3、When he’ll be back depends much on the weather.4、Whether she comes or not doesn’t concern me.5、Wherever he once lived is well preserved.6、It is natural that they should have different views.7、It was quite plain that she didn’t want come.8、It’s a pity that he can’t swim.9、It was a fearful disappointment to your mother that you didn’t come yesterday.10、It happened that she wasn’t in that day.11、It struck me that we ought to make a new plan.12、It was rumored that he was suffering from a tone in the kidney.13、It is estimated that 25 million school lunches are sold each day.14、Where I spend my summer is none of your business.15、It’s doubtful whether the payment is legal.16、It was a question whether he should get married.17、What the professor said is of great importance.18、Whoever break the rules will be punished.19、Who killed the scientist remains a question.20、It doesn’t matter whether she will come or not.二．賓語從句

1、We never doubt that he is honest.2、I can’t imagine what made him act like that.3、Nobody can tell when she will arrive.4、Before I came downstairs I had prepared myself very carefully for what I must say.5、You must give it back to whoever it belongs to.6、I’ve heard that you’ve won a scholarship.7、I feel it a terrible thing that my mother should have to toil so endlessly.8、We are talking about whether we admit students into our club.9、He told me that he was preparing for the English test.10、Our teacher told us that light travels much faster than sound.11、Can you tell me how I can get to the zoo?

12、The doctor insists that I give up smoking.13、She remember nothing about him except that his hair is black.14、I suggest that they shouldn’t drive along the coast.15、Have you found out how wide the ditch was?

16、Tomorrow at this time we will know who is elected?

17、Everybody knows that money doesn’t grow on tree.18、The villager didn’t realize how serious the pollution was until the fish in the river died.19、She said that she would come to the meeting.20、The book will tell you what the best CEO should do.三．表語從句

1、The fact is that he didn’t notice the car until too late.2、The mystery is whether he ever went there at all.3、The question is why he likes the place so much.4、The problem is not who will go but who will stay.5、Your brother’s health is not what it used to be.6、The question is whether they will b able to help us.7、His suggestions is that we should stay calm.8、It sounds as if someone is knocking at the door.9、He looked just as he had looked ten years ago.10、That is because he didn’t understand me.11、That is why he got angry with me.12、The problem is who we can get to replace her.13、The trouble is that I lost her address.14、The questions is whether we can rely on him.15、That is because we are in need of money at that time.16、He looked as if he was going to cry.17、The reason why he has to go is the his mother is ill in bed.18、The questions is whether it is worth doing.19、The mountain is no longer what is used to be.20、The questions is what caused the accident.四．同位語從句

1、They had to face the fact that the nearest filling station is 30 miles away.2、Have you any idea how soon they are coming?

3、Obviously there was little probability that they would succeed, but they didn’t mind.4、The suggestion that the new rule be adopted came from the chairman.5、There is a feeling in me that it is going to rain.6、The proposal has been put forward that the flight should be cancelled.7、The government gave an order that all the house should be pulled down in three weeks.8、We haven’t settled down the question where we are going to spend our summer vocation.9、There is no doubt that he will keep his promise.10、Many British parents hold the view that teenagers shouldn’t spend too much time online.11、The thought that they could cross the whole continent was exciting.12、I’ve come to the conclusion that it was unwise to do that.13、They expressed the wish that she accept the award.14、The question whether it is right or wrong depends on the result.15、The rumor spread that a new school would be built here.16、The questions who should do the work require consideration.17、The suggestion that the new rule be adopted came from the chairman.18、The news that oil price will go down is untrue.19、The question why so many animals died suddenly in that area remains unsettled.20、We have no scientific proof for the idea that time travel is impossible.12、

第二篇：名詞性從句例句分析

名詞性從句

主語從句、表語從句、賓語從句和同位語從句，它們在復合句中的功用相當于名詞，因此稱為名詞性從句，在句中分別作主語、表語、賓語和同位語。1．When he will come is still unknown.2．I don’t know who has watered the fields.3．The problem is that we need more money.4．Have you heard the news that our team won the game?

1． 主語從句：在復合句中作句子主語的從句。引導詞：連詞that、whether;疑問代詞who, what, which;疑問副詞when, where, how, why(1)連詞that（無詞意）, whether(是否), 在從句中不擔任句子成分，只起連接作用;whether能引導主語從句，而if不能。

That you don’t like him has nothing to do with me.Whether John will do this experiment remains a question.（2）疑問代詞who, what, which, 在從句中既作連接詞又充當主語、賓語、表語、定語等。

Who will be sent abroad to further his studies is not announced.What surprised me most was that such a little girl could play the violin so well.Which school will win the prize is not known.Whose dictionary has not been found is still unknown.Whichever you take will be yours.Whoever wants this book may take it.Whatever was said here must be kept secret.(3)疑問副詞when, where, how, why在從句中充當時間狀語、地點狀語、方式狀語、原因狀語

When they will start hasn’t been decided yet.Where the heroine went is not mentioned at the end of the story.How he managed to finish the composition in such a short time is still a mystery.Why he often comes here is known to us all.(4)用it作形式主語的主語從句常用的句型有： It’s said that… It is certain that…

It seems/ happens that…

It’s possible/ important/ necessary/ clear that…,該句型從句的謂語動詞使用虛擬語氣形式：should+動詞原形。

It is necessary that we should learn some English grammar.2.表語從句：在復合句中作句子表語的從句

引導詞有that, whether, what, which, who, whom, whose, when, where, why, how, because等（1）引導表語從句的that不省略，that僅起連接作用，在從句中不充當任何成分，無任何意義

The impression he makes on me is that he is a reliable person.(2)the reason后面的表語從句只能用that引導，我們學生易犯“the reason is because…”的錯誤

The reason why the little actress has been such a success is that she is both clever and hard-working.(3)在表示命令order等，建議suggestion, advice等的名詞后的表語從句中，謂語動詞要用虛擬語氣：

should+動詞原形，should可省略

His suggestion is that we(should)hold another meeting to discuss the problem.(4)whether可引導表語從句，表“是否”，它在從句中不充當成分，if不能引導表語從句。

The question is whether we can rely on him.(5)連接代詞what, which, who, whom, whose除起連接作用外，還在從句中做主語、賓語、表語和定語。

That’s what he is worried about.（在從句作中賓語）

The problem is who can do the work.（在從句中作主語）

（6）連接副詞when, where, why, how起連接作用外，還在從句中作狀語。That’s why I was late.That is where he was born.That is how he did it.(6)連詞because引導表語從句，只用在 That/This/It is because…結構中 That is because she often works hard.3．賓語從句：從句在句中充當賓語的成分。賓語從句可作謂語動詞的賓語，也可作介詞的賓語，也可作動詞不定式等非謂語動詞形式的賓語，還可作某些形容詞的賓語從句。Jenny thought(that)her teacher was unfair.I’d like to know which one is your husband.I am sure(that)he won’t mind.It all depends on whether they will support us.4.同位語從句：一般跟在某些名詞后面，用以解釋或說明前面的名詞的內容。經常帶同位語從句的名詞有fact, news, message, doubt, possibility, idea, reason, belief, hope, thought, promise, suggestion, question等。引導詞有連詞that, whether；連接代詞who, which, what和連接副詞where, when, why, how等（1）that, whether只起連接作用，不在從句中作任何成分。The idea that England stands for fish& chips…is past.There is no doubt that the price of cars will go down.The problem whether we should continue to do the experiment has been solved.(不能用if)(2)連接代詞who, which, what和連接副詞where, when, why, how在從句中作相應成分。He can’t answer the question how he got the money.The question who should go abroad requires consideration.I have no idea which one I should choose.I’ve got a pretty good idea why they left early.The question where we should go has not been discussed.I have no idea when Jack will be back.同位語從句與定語從句的區別：

We expressed the hope(that)they had expressed.我們表達了他們曾經表達過的那種希望。（定語從句）

We expressed the hope that they would come to visit China again.我們表示希望他們再來中國訪問。（同位語從句）

1）從語法角度上看，引導同位語從句的that是連詞，只起連接作用，在從句中不作任何句子成分；而引導定語從句的that是關系代詞，除起連接作用外，還在從句中作主語或賓語等句子成分。

2）從語義角度上看，同位語從句與前面的名詞hope是同位關系，表示hope的內容是they would come to visit China again。因而同位語從句是名詞性的，其功能是對名詞作補充說明；而定語從句與它前面的名詞是所屬關系，表示“…的”（他們曾經表示過的），起修飾作用，因此定語從句是形容詞性的，其功能是修飾先行詞。

3）同位語從句的連詞that不能省略，而定語從句的關系代詞that，當其在從句中作賓語中，可省略，作主語也不可省略。

I’ve heard the news that he visited our factory.I’ve heard the news that he told you the other day.The news that the plane would take off on time made everybody happy.The news that is spreading around the airport is that a heavy storm is coming.The suggestion that students should learn something practical is worth considering.The suggestion that they are considering is that students should learn something practical.

第三篇：名詞性從句

2007年高考試題單項選擇語法分類匯編

十二.名詞性從句

1.____ matters most in learning English is enough practice.[2007 全國卷II]

A.What B.Why C.Where D.Which

2.______ he referred to in his article was unknown to the general reader.[2007 上海卷]

A.That B.What C.WhetherD.Where

3.The traditional view is ______ we sleep because our brain is “programmed” to make us do so.[2007 上海卷]

A.when B.why C.whetherD.that

4.Could I speak to---------is in charge of International Sales ,please? [2007 山東卷]

A．anyoneB．someoneC．whoeverD．nomatter who

5.You can only be sure of_________ you have at present;you cannot be sure of something _____ you might getin the future.[2007 安徽卷]

A.that;whatB.what;/C.which;thatD./;that

6.—Where’s that report?

—I brought it to you ____you were in Mr.Black’s office yesterday.[2007 北京卷]

A.ifB.whenC.becauseD.befor

7.It is none of your businessother people think about you.Believe yourself.[2007 福建卷]

A.howB.whatC.whichD.when

8.Having checked the doors were closed , and _________ all the lights were off, the boy opened the door to his bedroom.[2007 湖南卷]

A.whyB.that

[2007 江蘇卷]

A.what B.why C.how10.parents say and do has a life-long effect on their children.[2007 陜西卷]

A.ThatB.WhichC.WhatD.As

you read．[2007 上海春]

A．that B．what C．which D．whether

12.The seaside here draws a lot of tourists every summer.Warm sunshine and soft sands make ________ it is.[2007 天津卷]

A.whatB.whichC.howD.where

13.Why not try your luck downtown, Bob? That’s ______ the best jobs are.[2007 浙江卷]

A.whereB.whatC.whenD.why

第四篇：名詞性從句

名詞性從句

名詞性從句相當于名詞，可分別作主句的主語、表語、賓語和同位語。因此，名詞性從句廳分為主語從句、表語從句、賓語從句和同位從句。一．引導名詞性從句的連接詞

1、連接代詞：who, whose, whom, what, which。有詞義，在從句中擔任成分，如主語、表語、賓語、或定語等。

2、連接副詞：when, where, why, how。有詞義，在從句中擔任成分，作狀語。

3、連接詞：that, whether, if, as if。that 無詞義，在從句中不擔任成分，有時可省略；if(whether), as if雖有詞義，但在從句中不擔任成分。

注意：連接代詞與連接副詞在句中不再是疑問句，因而從句中謂語不用疑問式。連接代詞與連接副詞在從句充當句子成分，連接詞whether 和if（是否），as if（好象）在從句中不充當句子成分，只起連接作用。根據句義，如果連接代詞與連接副詞，whether、if 和as if都用不上時，才用that作連接詞（that本身無任何含義）。二.名詞性從句的分類如下

（一）主語從句

主語從句的句型.引導詞有疑問詞wh-及whether/if及that.1、主語從句在復合句作主語。疑問詞引導e.g.Who will go is not important.2、用it作形式主語，主語從句放在句末。

3、If/whether 引導e.g.It doesn’t matter so much whether you will come or not.4．It+be+adj(obvious,true,natural,surprising,good,wonderful,funny,likely,certain,probable,etc)/名詞詞組（no wonder,an honor , a good thing,a pity,etc)+that從句 e.g.It’s certain that she will do well in the exam/It’s no surprise that our team has won the game.5．It+be+過去分詞（said,reported,thought,expected,decided,announced,etc)+that從句

e.g.It’s said that Mr.Green has arrived in Beijing.Note:that引導主語從句時，在口語和非正式文體中可以省略，但that從句置于開頭時不能省略。e.g.That he suddenly fell ill last week made us surprised.（二）表語從句

表語從句的句型及要點。引導詞疑問詞wh-及whether及that.1、表語從句在復合句中作表語，位于系動詞之后。疑問詞引導的： e.g.The question was who could go there.Note: 引導表語從句的連接詞that一般不可省去。

e.g.My idea is that we can get more comrades to help in the work.連接詞that一般不能省略，但當主句中含動詞do的某種形式時，that可以省略。如： What I want to do is(that)I can go up to him and thank him.我想做的事是走到身邊去感謝他

（三）賓語從句

賓語從句在復合句中作賓語。引導詞有疑問詞wh-及whether、if(if 和whether 有區別）及that.引導賓語從句的連詞that一般可省略。e.g.I hope(that)everything is all right.Note:以下情況that不可省略：(不考查）

1.當賓語從句的主語是that時。2.2.當賓語從句中含有主從復合句時 Father promised that I studied harder he would take me to Beijing.3.當兩個或多個賓語從句由并列連詞連接時，除第一個從句中的that可以省略外，其余從句中的that都不可以省略。

4當that偶爾作except和in的賓語時。This book is unsatisfactory in that it lacks a good index.中，that it lacks a good index就是介詞 in 的賓語從句，這當中的that就不能省略。

（四）同位語從句。引導詞wh-及whether及that.同位語從句引導詞有疑問詞wh-及whether及that.同位語從句在句中作某一名詞的同位語，一般位于該名詞（如：news, fact, idea, suggestion, promise等）之后，說明該名詞的具體內容。e.g.I have no idea when he will be back.The fact that he had not said anything surprised everybody.名詞性從句易混知識歸納

易混點一 ：同位語從句與定語從句的區別

that引導的從句，是定語從句還是同位語從句，我們我們采用“試加 法”，來判斷。The fact that he had not said anything surprised everybody.This is the fact that you must know clearly.1.when、where、why引導的從句

引導定語從句時，其意義與先行詞有關，與先行詞的意義基本相同，沒有疑問意義；但引導同位語從句時，其意義完全與疑問詞相同，即when表示什么時候，where表示哪兒，引導兩種從句時，都在從句中做狀語。如： I still remember the day when I first came to Beijing.句中的when相當于“on the day”它沒有疑問詞“什么時候”的意義，因此是定語從句。

I have no idea when she will be back.when與idea毫無意義上的關聯，其意思是“什么時候”,因而是同位語從句。易混點二：reason后面的名詞性從句

reason做主語時，后面的表語從句表示原因是要用that引導，一般不用because或why，而用it，this或that做主語時，后面的表語從句可用because或why引導。

1.“The reason +連系動詞+that“引導的表語從句。本句型的意思是：理由是：。。。The reason was that he fell ill.2.It（或This、That）+連系動詞+the reason+why引導的定語從句。本句型意為：這就是。。。的原因（理由）That is the reason why he failed in the contest, 3.It（或This、That）+連系動詞+the reason+because引導的表語從句。本句型意為：這是因為。。。；這是由于。。。的緣故。That was because he fell ill.4.It（或This、That）+連系動詞+why引導的表語從句。本句型意為：這就是。。。的原因。

That was why he fell ill.易混點三：what、whatever、who、whoever等引導的名詞性從句 我們可以通過與定語從句的轉化知道兩組在意義上的差別。Whatever=anything that（無論什么）Whoever=anyone who（無論誰）

Whenever=any time=no matter when（無論何時）Wherever=any place=no matter where（無論何地）這都是泛指。而what、who、when、where則是特指。如： Who spoke at the meeting is unknown The person that spoke at the meeting is unknown.Whoever breaks the law will be punished.Anyone who breaks the law will be punished.注意：1.whatever、whoever、whenever、wherever等常引導主語從句、賓語或表語從句，也可以引導狀語從句，等于“no matter +疑問詞”。而no matter +疑問詞只能引導讓步狀語從句。Eg：Whatever I said/No matter what I said, he wouldn’t listen to me..2whoever的賓格還是whoever，一般不用whomever。易混點 whether與if（不做考查）

二者都可以作“是否”講，能引導名詞性從句，都不能省略。1.在及物動詞后引導賓語從句時可以互換；

注意：在某些動詞后（如:discuss）只能接whether，不能跟if。如： We discussed whether we should close the shop.2.引導主語從句、表語從句、同位語從句時都用whether，不用if。如：

The question whether he should come himself or send another man hasn’t been decided.Whether he will win is all the same to me.The question is whether you can go there yourself.但如果主語從句是有It用作形式主語，if和whether都可以 It is unknown whetherif she is ill.3賓語從句中，如果whether后緊跟or not，不用換做if；若whether與or not分開使用，則可以換作if。如： I wonder whether or not he has arrived at the destination.I don’t know whetherif I can come or not.4.若賓語從句為否定結構，則多用if，而不用whether。如： I don’t care if he doesn’t show up.（炫耀）

5.在介詞后引導賓語從句或與帶to的動詞不定式結合而構成不定式的復合結構時，只能用whether，而不用if。如：

I haven’t settled the question of whether I will go back home.She doesn’t know whether to get married now or wait.練習：名詞性從句

1.Do you see _____ I mean? 2.Tell me_____ is on your mind.3.We must stick to _____ we have agreed on.4.Let me see _____I can repair the radio or not.5.Keep in mind _____ the teacher said 6.Could you advise me _____ book I should read first? 7.He was criticized for _____ he had done.8.Would you kindly tell me _____ I can get to the Beijing Railway Station? 9.Mrs.Smith was very much impressed by _____ she had seen in China.10.We took it for granted ___ they were not coming.11.I really don't know _____ I should do next.12.I'm afraid _____ the little girl will have to be operated on.13.She walked up to _____ I stood.14.Can you tell me _____ that gentleman is? 15.We'll give you _____ you need.16.They want us to know _____ they can do to help us.17.We must put _____ we have learned into practice.18.Did she say anything about _____ the work was to be done yesterday? 19.He was never satisfied with _____ she had achieved in her work.20.These photographs will show you _____ our village looks like.21.Peter insisted _____ he pay the bill for the dinner.22.They urged _____ the library open during the vacation.23.We wish we could have learned _____ you did when we were at high school.24.1 will describe to you _____ I saw when I go there.25.From _____ 1 know of him I should say he is a good worker.26.I will give this dictionary to __ wants to have it.27._____ they will come here hasn' t been decided yet.28._____ was said here must be kept secret.29.It is still a question _____ we shall have our sports meet.30.It is strange _____ she have left without saying a word.31.It is very clear _____ our policy is a correct one.32._____ Mr Zhang said is quite right.33.It's a great pity _____ we won’t be able to finish the task on time.34._____ you have done might do harm to other people.35._____ leaves the room last ought to turn oft the lights.36._____ the 2008 Olympic Games were held in Beijing is known to all.37._____ fails to see this will make a big mistake.38.__ we need more equipment is quite obvious.39.Has it been announced _____ the planes are to take off? 40._____ is troubling me is _____ I don’t understand _____ he said 41.Things were not _____ they seemed to be.42.They are just _____ I want to have.43.That is _____ we decided to put the discussion off.44.My suggestion is _____ we should send a few comrades to help them.45.The idea _____ all people are selfish is wrong.46.We heard the news _____ our team had won.47.The fact _____ he hadn’t said anything surprised us all.48.We must keep in mind the fact _____ China is still a developing country.高考真題 2011--2013年高考

1._______ Barbara Jones offers to her fans is honesty and happiness.2.The message you intend to convey through words may be the exact opposite of _____ others actually understand.3.I’m afraid he’s more of a talker than a doer, which is _____ he never finishes anything.4.We’ve offered her the job, but I don’t know _____ she’ll accept it.5.It was never clear _____ the man hadn’t reported the accident sooner.6.Modern science has given clear evidence _____ smoking can lead to many diseases.7.When the news came ____ the war broke out, he decided to serve in the army.8.Before a problem can be solved, it must be obvious ____ the problem is.9.I’d like to start my own business—that’s _____ I’d do if I had the money.10.The villagers have already known ____ we’ll do is to rebuild the bridge.11.It is still under discussion _____ the old bus station should be replaced with a modern hotel or not.12.To show our respect, we usually have to take our gloves off _____ we are to shake hands with.13.Our teachers always tell us to belive in _____ we do and who we are if we want to succeed.14.There is clear evidence_____ the most difficult feeling of all to interpret（表達）is bodily pain.2012年高考

1.We can not clear ____ the president can do to end the strike.2.The notice came around two in the afternoon _____ the meeting would be postponed.3.I made a promise to myself _____ this year, my first year in high school, would be different.4.We promise _____ attends the party a chance to have a phone taken with the movie star.5.The limits of a person’s intelligence, generally speaking, are fixed at birth, but ____ he reaches the limits will depend on his environment.6.It doesn’t matter____ you turn right or left at the crossing-both roads lead to the park.7.The newcomer went to the library the other day and searched for ____ he could find about Mark Twain.8.As many as five courses are provided, and you are free to choose _____ suits you best.9._____ he had left keys in the office was known to us..10.Evidence has been found through years of study ___ children’s early sleeping problems are likely to continue when they grow up.2013年高考

1.I have no idea ____ the cell phone isn’t working, so could you fix it for me? 2.____ you said at the meeting describes a bright future for the company.3.____ struck me most in the movie was the father’s deep love for his son.4.From space, the earth looks blue.This is ____ about seventy-one percent of its surface is covered by water.5.____ I want to tell you is the deep love and respect I have for my parents.6.______ one of you breaks the window will have to pay for it.7.The only way to succeed at the highest level is to have total belief ___ you are better than anyone else on the sports field.8.It’s good to know___ the dog will be well cared for while we’re away.9._____ makes the book so extraordinary is the creative imagination of the writer.10.Police have found ____ appears to be the lost ancient statue.名詞性從句翻譯練習

1.你不喜歡他與我無關 2.湯姆已經回來了這很清楚 3.紙是中國首先造出來的這是事實。4.你要的是兩個蘋果嗎？ 5.老師問我們是否知道王芳在那里。6.我叔叔說他很快就會回來 7.他說的話沒有一句是真的。8.這取決于你是否想做這件事。9.我為什么遲到的原因是我在半路上遇到塞車了。10.她的頭發變白了使她有點擔心。11.他們就何時何地舉行這次多國會議達成了一致意見。

12.你們的任務是在六點鐘以前想盡一切辦法找些吃的回來,否則，今晚我們就得挨餓。13.我對你們學英語的建議就是多讀，多聽，多寫。14.我們必須面對這個事實即我們已經花光了所有的錢。

15.他要醫院給他做出解釋的要求是合理的 16.他問我買小提琴花了多少錢。17.你想象不到他們在收到這份精美的禮物時有多么激動。

18.問題是我們應該做什么來幫助他。19.你同意我們后天去旅行的計劃嗎？20.什么時候，怎樣回家那是他自己的決定。21.哪一只球隊會取勝還不一定。22.三天后，我們聽到了這樣的消息我國有發射一顆人造衛星。23.任何對此事視而不見的（ignore / fail to do）人將回鑄成大錯。

24.運動會這個星期或是下星期開都沒有關系。25.我們現在做的以前從來沒有做過。36.你能告訴我這本字典是屬于誰的嗎？

高中名詞性從句講解與練習

參考答案 名詞性從句

1~5 DBABD 6~10 DBBCA 11~15 CABCC 16~20 BADAB 21~25 CDAAA 26~30 CCCDB 31~35 ABCDB 36~40 BDACD 41~45 BCDBB 46~50 ADBAC 51~55 CCBDA 56~60 ADABB 61~65 ACDBA 高考題：2011：BDDCACCADCABDD 2012：DBCCB ADADD 2013: BCCCD CBDBD 1.That you don’t like her has nothing to do with me..2.It was very clear that Tom had returned 3.It is the fact that paper was first made in China 4 4.Are what you want two apples

第五篇：名詞性從句教案

名詞性從句包括：

主語從句

表語從句

賓語從句

同位語從句

? The question is who can complete the difficult task.? He has no idea what a remarkable woman Mary is.? That she was able to come made us very happy.? He objected that it was impossible.一、主語從句

1、主語從句在復合句中作主句的主語

That she was chosen made us very happy.What caused the accident is a complete mystery.Whoever comes to the party will receive a present.【注】 “that”在主語從句中不作任何成分，但放在句首時不能省略。

2、問：怎么才能 that 不放在句首呢？

答：有時為了使句子結構平衡，避免“頭重腳輕”，常用it作形式主語，而把從句放在后面。

It depends on the climate whether they are going shopping today.試試看：新產品銷售得好不好取決于它的質量和價格。

It作形式主語的幾種結構：

1、It+ be +形容詞+ that從句

It is strange that he knows nothing about it.2、It+ be +名詞+ that從句

It is a pity that they have failed in the match.3、It+動詞+賓語+ that從句

It depends on its quality and price whether a new product sells well.4、It+動詞的被動結構+ that從句

It is still unknown which team will win the match.作文常用句式：

1、It turned out that...結果是?

2、It has been proved that...已經證明?

3、It is well-known that...眾所周知?

4、It must be pointed out that...必須指出?

二、表語從句

1、表語從句在復合句中作主句的表語

The reason is that you don’t trust her.This is where I disagree.例：The reason ____ we didn't trust him is ______ he has often lied． reason 后面的表語從句只能用that 引導, 不能用because 引導, 但reason后面的定語從句可以用why。

2、表語從句不能用if引導，但可用as if引導。例如： He looked as if he was going to cry.三、賓語從句

賓語從句在復合句中作主句的賓語，賓語從

句一般放在動詞、介詞或形容詞后。

She explained that she was late because of the heavy traffic.【注】

① 有時要用it作形式賓語，而把賓語從句放在句子的后面。He has made it clear that he will not give in.①

如do you think/believe/suppose/expect/imagine后接特殊疑問詞引

導的賓語從句，疑問詞要放在句首。

What do you think is going on outside? ③

I/We(don’t)think/believe/suppose/expect/imagine后接賓語從句

時，反義疑問句要與從句中的主語和謂語保持一致。

I don’t suppose he cares，does he? ④ 在賓語從句中，引導詞whether和if基本一樣，但介詞后的賓語

從句多用whether。

It all depends upon whether we can get their cooperation.⑤ 動詞doubt如用于肯定句，其后的賓語從句常用if/whether引導，如用于否定句或疑問句，則賓語從句用that引導。

I doubt if/whether our football team will win the match.I don’t doubt that I can defeat him in the contest.四、同位語從句

在主從復合句中作同位語的從句稱為同位語從句。同位語從句常放在fact, news, idea, truth, hope, problemin, formation 等名詞后面，用以說明該名詞的具體內容。

The news that they had won the game soon spread over the whole school.?

引導同位語從句的關聯詞用that時，不能省略，不能用which替代

1.引導詞that與what的區別

? what從句中作句子成分(主語、賓語、表語等)what=all that/everything that ? that引導的主語從句放在句首時，不能省略

What we can’t get seems better than what we have.That a new teacher will come to teach us geography is true.2.引導詞if和whether的區別

? whether或if均可表示“是否”的情況如下：

引導賓語從句。例如：

I wonder whether/if the news is true or not.? 只能用whether不能用if表示“是否”的情況：

? 在表語從句中。例如：

The question is whether the film is worth seeing.? 在同位語從句中。例如：

The news whether our team has won the match is unknown.Answer my question whether you are coming.? 在主語從句中。例如：

Whether we shall attend the meeting hasn’t been decided yet.如果用it作形式主語，則whether和if都能引導主語從句。

例如：It hasn’t been decided whether/if we shall attend the meeting.? 用于句型“名詞+as to + whether”中。例如：

There is some question as to whether the public should be told about the accident.? 后面直接跟動詞不定式時。例如：

He doesn’t know whether to stay or not.? 后面緊接or not時。例如：

We didn't know whether or not she was ready.? 用if會引起歧義時。例如：

Please let me know if you like it.該句有兩個意思 “請告訴我你是否喜歡”或 “如果你喜歡，請告 訴我”用了 whether就可以避免歧義。3.引導詞who與whoever的區別

whoever引導名詞性從句時，相當于anyone who或those who，它

既是從句的主語，又是主句的主語。而who只作從句的主語，它

引導的從句才是主句的主語。

Whoever has helped to save the drowning girl is worth praising.Who will be elected president doesn’t make much difference to me.4.引導詞what與whatever的區別

whatever引導名詞性從句時，與what差不多，只是語氣上更強

些，有“任何一切??”之意。

? This is exactly what I want.? It is generally considered unwise to give a child whatever he or she wants.5.同位語從句與定語從句的區別

同位語從句本身完整，定語從句不完整，因此其前的名詞在定語從句中通常作主語、賓語或表語等成分。I made a promise that if anyone set me free I would make him very rich.The mother made a promise that pleased all her children.從結構看，同位語從句常由連接詞that引導，雖在從句中不充 當任何成分,但不可省略。而定語從句中由關系代詞引導，代替先行 詞，并在從句中充當成分（主語或賓語），充當賓語時常可省略。6.It 作形式主語和it引導強調句的比較

將 “it is/was?that?”去掉后,句子仍然成立的是強調句,否則是that引導的主語從句 如：

It is a pity that you didn’t go to see the film.It is in the morning that the murder took place.It is John that broke the window.7.whoever與no matter who；whatever與no matter what whoever和whatever既可以引導名詞性從句，也可引導讓步狀語

從句；no matter who和no matter what只引導讓步狀語從句。Whatever(＝No matter what)you may think，I’m going ahead with my plans.Take whatever you need and leave me alone.9.名詞性從句中的語氣

(1)在It is necessary/natural/important/strange...＋that從句中，從句中的謂語動詞用“should＋原形動詞”表虛擬語氣，且should 可省略。

It is necessary that the problem should be settled at once.(2)表示“建議、命令、要求”意義的動詞，后接that從句時，從句

中的謂語動詞要用虛擬語氣，即“should＋原形動詞”，且should 可省略。

Bob’s doctor suggests that he(should)rest for a few days.(3)表示“建議、要求、命令、想法”意義的名詞，后接that從句時，從句中的謂語動詞要用虛擬語氣：“should＋動詞原形”，should可以省略。

這類名詞有：advice，agreement，command，decision，demand, determination，order，preference，proposal，request，requirement等。This is our only request that this(should)be settled as soon as possible.同樣，如主語是表示“建議、要求、命令、想法”意義的名詞，那么that引導的表語從句中也要用虛擬語氣。

Her suggestion was that they(should)carry on their conversation in French.