“It”作形式主語和形式賓語的用法詳解

1、新希望英語語法精講-“It作形式主語和形式賓語“It作形式主語和形式賓語的用法詳解 It作形式主語和形式賓語用法，是英語學習的主要語法工程之一。無論是單項選擇，還是完行填空，it用法始終是反復考查的重、熱點之一。現(xiàn)將it在特殊句型中作形式主語和形式賓語用法，進行如下歸納分析，以供學習參考。 一、 It 用作形式主語 當不定式短語、動名詞短語或從句在某個句子中作主語時，為保持句子結(jié)構前后平衡，防止頭重腳輕，因此常用it作形式主語置于句首，而將真正的主語放在句尾。此時it只起先行引導作用，本身無詞義。 e.g. It is wrong to tell a lie. (說謊是錯誤的。) It為to

2、tell a lie的形式主語 It is no use arguing about it. (爭吵是沒用的。) It為arguing about it的形式主語 It is uncertain who will come. (誰要來還不確定。) It為who will come的形式主語 It 作形式主語的常見句型： It + be + 形容詞 + to do sth. / doing / that . e.g. It is very important to learn a foreign language. (學一門外語非常重要。) It is useless crying over t

3、he spilt milk. (覆水難收。) It was really surprising that she married a man like that.(她嫁給那樣的男士真讓人驚訝。) It + be +名詞詞組 + doing / that . e.g. It is no good telling lies. (撒謊沒好處。) It is a pity that you didnt go to see the film yesterday. (你昨天沒看成那部電影真遺憾。) It is a truth that there would be no new China without

4、 the Communist Party. (沒有共產(chǎn)黨就沒有新中國，這是毋庸質(zhì)疑的。) It + be + 過去分詞 + that . 該句型常見動詞有：say, hope, think, suppose, expect, report, know, believe, decide, etc. e.g. It is said that they have invented a new type of computer. (據(jù)說他們創(chuàng)造了一種新型電腦。) It is believed that China will become one of the strongest countries i

5、n the world. (大家都相信中國將會步入世界強國之列。) It was reported that more than 170 thousand people died in the 2004 tsunami. (據(jù)報道，至少有十七萬人在2004年那場海嘯中喪生。) It + seems / appears / happens等不及物動詞 + that . e.g. It seems that he enjoys pop songs very much.(似乎他非常喜歡流行歌曲。) It appears that Tom might change his mind. (看來湯姆可能會

6、改變主意。) 假設句子是疑問形式，就只能用it作形式主語。 e.g. Does it matter much that they wont come tomorrow? (他們明天不來很重要嗎？) Is it true that he will go abroad next week? (他下周出國是真的嗎？) It + takes + (sb.) + some time + to do sth. 這是一個表示“某人花多少時間干某事的句型，其中it是形式主語，代替后面的不定式to do sth.，句型中的sb.也可以省略。 e.g. It took me some time to read t

7、he reading materials.(我花了一些時間才讀完那段閱讀材料。)It took him fourteen hours to go to New Zealand from Shanghai by plane.(從上海乘飛機去新西蘭花了他14小時。)How long does it take you to go to Beijing from Qingdao by train? (從青島坐火車到北京一般要花多久時間？)I am not sure, but I think it takes at least nine hours to get there. (我不能肯定，但估計至少要

8、九個鐘頭才能到那兒。) 二、It 用作形式賓語 當不定式短語、動名詞短語或從句在某個句子中作賓語時，為保持句子結(jié)構平衡，防止句式結(jié)構的混亂，常用it作形式賓語，而將真正的賓語放在句尾。此時it仍只起先行引導作用，本身無詞義。 以下四種情況須用it 作形式賓語： 當不定式短語、動名詞短語或從句在復合賓語結(jié)構中作某些動詞的賓語時如think, make, find, consider, feel, suppose等；e.g. They found it pleasant that they worked with us Chinese.他們發(fā)現(xiàn)與我們中國人一起工作很愉快。 I dont feel

9、it difficult to understand the Special English. 我覺得理解英語特別節(jié)目并不難。 He makes it a rule never to borrow money. 他立志決不向別人借錢。 I think it no need talking about it with them. 我認為沒必要跟他們談。 某些表示“喜、怒、哀、樂的動詞，如like, enjoy, love, hate等，往往不能直接接賓語從句； e.g. I dont like it that hes so lazy. 我不喜歡他那么懶惰。 I hate it when my m

10、other asks me to eat eggs. 我討厭母親要我吃雞蛋。 that引導的賓語從句不能直接作介詞的賓語； e.g. You may depend on it that we shall always help you. 盡管放心，我們會隨時幫你的。 Would you see to it that she gets home early? 你負責保證她早到家，好嗎？ He insisted on it that he was innocent. 他堅持說自己是無辜的。 由及物動詞與介詞組成的固定搭配中，賓語從句假設作該動詞的賓語時，須借用it。 e.g. I leave it

11、 to your own judgement whether you should do it. 我讓你自己判斷這事是否該做。 We owe it to you that there wasnt a serious accident. 多虧了你才沒有發(fā)生嚴重事故。 練習一 1. Is _ necessary to complete the design before National Day? A. this B. that C. it D. he2. I dont think _ possible to master a foreign language without

12、much memory work. A. this B. that C. its D. it3. Does _ matter if he cant finish the job on time? A. this B. that C. he D. it4. Toms mother kept telling him that he should work harder, but _ didnt help. A. he B. which C. she D. it5. _ is a fact that English is being accepted as an international lang

13、uage. A. There B. This C. That D. It6. I hate _ when people talk with their mouths full. A. it B. that C. these D. them7. Dont _ that all those who get good grades in the entrance examination will prove to be the most successful. A. take as granted B. take this for granted C. take that for granted D

14、. take it for granted8. I like _ in the autumn when the weather is clear and bright. A. this B. that C. it D. one 練習二 1. _ happened _ he is unfit for the office.A. This; that B. That; that C. It; that D. He; that2. We took _ for granted that they would accept our advice.A. that B. this C. it D.

15、 them3. _ that the scientist will give us a talk next month?A. Is true B. Is it true C. Its true D. Its truly4. _ doesnt matter much _ dress you are going to wear.A. This; that B. That; who C. It; which D. It; who5. _ is going to America for further study. A. He is said that B. People said that he C

16、. It was said he D. It is said that he6. They are good friends. _ is no wonder that they know each other so well.A. This B. That C. There D. It7. Is _ possible to fly to the moon in a spaceship?A. this B. there C. that D. it8. She liked _ when he kissed her. A. him B. that C. one D. it9. _ will do y

17、ou good to do some exercise every morning. A. It B. There C. Those D. One10. We think _ our duty to pay taxes to our government.A. that B. this C. its D. it Key: 練習一1-8 CDDDDADC 練習二1-5 CCBCD 6-10 DDDADit作形式主語和形式賓語it既可作人稱代詞，用來表示動物或無生命的物體等，也可以作無人稱代詞，在句中作主語，表示“時間、“距離、“天氣等。它還可以引導強調(diào)句，使語氣得以加強。此外，it在句中能作引導

18、詞，充當句子中的形式上的成分，如形式主語、形式賓語等。 it作形式主語：it作形式主語時沒有具體的意義，而只是幫助把真正的主語移到句子后部去，使句子顯得平穩(wěn)一些。it作形式主語時，可以代替三種形式：不定式、動名詞和主語從句。1. it代替不定式短語 常用于以下句型中：It + be +形容詞 + (for/of sb.) to do sth.It + be + 名詞 + to do sth.It takes sb. some time to do sth. 干花了某人時間Its up to sb. to do sth. 干是某人的職責或義務如：It is everyones duty to o

19、bey the law.遵守法律是每個人的義務。 it作形式主語, 代替不定式短語to obey the lawIt is difficult for a foreigner to learn Chinese.對于一個外國人來說，學習漢語是困難的。 it作形式主語, 代替不定式短語to learn ChineseIt is not right to use these places as rubbish dumps.把這些地方用來倒垃圾是不對的。it作形式主語, 代替不定式短語to use these places as rubbish dumpsIt took them a year to

20、build the bridge.建這座橋花了他們一年的時間。 it作形式主語, 代替不定式短語to build the bridgeIt is bad manners to stare at people.瞪著眼睛看人是不禮貌的。 it作形式主語, 代替不定式短語to stare at peopleIt is up to us to help those in need.幫助那些有困難的人是我們的責任。 it作形式主語, 代替不定式短語to help those in needIt is not up to you to tell me how to do my job.我怎樣干我的工作不用

21、你來多嘴。 it作形式主語, 代替不定式短語to tell me how to do my job It be + 形容詞+ for sb. to do sth.與It be + 形容詞+of sb. to do sth.：如果句型中的形容詞描述的是sb.的品質(zhì)、品格，在邏輯上可以作sb.的表語，那么sb.前應用介詞of，否那么就用for。如：Its necessary for us to use a short-wave radio to pick up the programmes.我們用一臺短波收音機收聽這些節(jié)目是必要的。Its important for us to learn Eng

22、lish well.學好英語對我們來說是重要的。Its kind of you to help me.感謝你對我的幫助。= You are kind to help me. It was foolish of him to give up the job.他放棄那工作是愚蠢的= He was foolish to give up the job. it代替動名詞短語：動名詞作主語用后置形式的情況遠不及不定式那么普遍，常限于no good, no use, useless, waste等詞的后面。 It is no good/ use having a car if you cant drive

23、.如果你不會開車，有車也沒用。( it作形式主語,代替動名詞短語having a car)It is a waste of time watching TV.看電視是浪費時間。 it作形式主語,代替動名詞短語watching TVIt is no use asking him.問他沒有用。 it作形式主語,代替動名詞短語asking himIt is no use talking to him about it.和他談這事沒有用。 it作形式主語,代替動名詞短語talking to him about it it代替主語從句：這個主語從句可以用連詞that引導，也可以用連接代詞或連接副詞引導。

24、如：It was clear that they had no desire for peace.很清楚他們沒有和平的誠意。 it作形式主語,代替主語從句that they had no desire for peaceIt is doubtful whether she will be able to come.她能否來還很難說。 it作形式主語,代替主語從句whether she will be able to comeIt was clear enough what she meant.她的意思是夠清楚的。 it作形式主語,代替主語從句what she meantIt hasnt bee

25、n made clear when the new road is to be opened to traffic.還沒明確宣布新路什么時候通車。 it作形式主語,代替主語從句when the new road is to be opened to trafficIt is a mystery to me how it all happened.這都是怎么發(fā)生的對于我來說還是一個謎。 it作形式主語,代替主語從句how it all happened用it作形式主語，把真正的主語從句移至后面的常見句型有： It is a pity/ a shame/ a fact/ an honour/ go

26、od news/ no wonder/ a wonder that如：It was a pity that the engineer couldnt come.可惜工程師沒能夠來。It is a wonder that he continues to gamble when he always loses!令人驚訝的是他一直輸還一直賭。It isno wonder (that) you were late!難怪你來晚了。It is a shame that the rain spoiled our picnic.真可惜，這場雨把我們的野餐給攪了。It is a fact that Englis

27、h is being accepted as international language.英語被認為是國際語言，這是一個事實。 It is + 形容詞如： strange/ natural/ surprising/ obvious/ true/ fortunate/ wonderful/ funny/ possible/ impossible/ likely/ unlikely/ clear/ unusual/ certain/ importantthat 如：It is certain that he will win.他一定會取勝。It is important that we shou

28、ld learn from each other and help each other.我們應當互相學習，互相幫助，這是很重要的。It was obvious that the child had been badly treated.很顯然那個孩子受過虐待。It is likely that he will ring me tonight.他今晚可能給我打 。It is strange that he should have left without telling us. 真奇怪，他也沒說一聲就走了。It is unlikely that their group will get ahe

29、ad of us. 他們小組不會趕到我們前頭去。 It seems/ happened/ turned out/ suddenly struck me/ occurred to methat 如：It happened that I wasnt there that day. 恰好那天我不在那里。It seems that his idea is more practical.看起來他的意見更實際一些。It suddenly occurred to me that I knew how to solve that problem.我突然想起我知道怎樣解決那個問題。 It + be + 過去分詞

30、如：said/ reported/ announced/ decided/ expected/ hoped/ known/ believedthat如：It is hoped that the number of deer will greatly increase very soon.(相當于：People hope that the number of deer will greatly increase very soon)人們希望鹿的數(shù)目將會很快增加。It is said that nothing has been done about it. 據(jù)說至今對此沒采取任何措施。It is

31、reported that more than twenty people were killed in that bus accident.據(jù)報道在那次的公共汽車事故中有二十多人喪生。It is known that he is one of the best teachers in our school.大家都知道他是我們學校最好的教師之一。It is believed that the flood there is the biggest in 100 years.據(jù)認為那兒的洪水是百年來最大的洪水。* 注意要在It is suggested/required/desired/order

32、ed/proposedthat的主語從句中用虛擬語氣：(should) + 動詞原形如：It is requested that he give a performance at the party.有人請求他在聚會上表演一個節(jié)目。It is suggested that we should get everything ready by tonight.建議一切在今晚準備好。It is ordered that the radio be sent there at once.據(jù)命令，這臺收音機要立刻送到那里去。 It doesnt matter +連接代詞或副詞It doesnt make

33、too much difference +連接代詞或副詞如：It doesnt matter whether he comes or not.他來還是不來都沒關系。It wont make much difference whether you go today or tomorrow.你今天去也好，明天去也好，關系不大。 it作形式賓語：it作形式賓語時，可以代替三種形式：不定式、動名詞和賓語從句。it作形式賓語時，需具備兩個條件： 真正的賓語是不定式、動名詞或從句 有賓語補足語具備了這兩個條件，形式賓語it一定要用。1. it代替不定式短語think/ find/ feel/ consid

34、er/ make/ regard+ it +形容詞/名詞 + 不定式短語如：I find it pleasant to work with him.(it 作形式賓語，代替不定式短語to work with him)我覺得和他一起工作很愉快。They felt it difficult to finish the work in such a short time. it 作形式賓語，代替不定式短語to finish the work in such a short time他們認為在這么短的時間內(nèi)完成這項工作是困難的。She thinks it her duty to help us. it

35、 作形式賓語，代替不定式短語to help us她覺得幫助我們是她的責任。I think it my honor to be invited to speak here. it 作形式賓語，代替不定式短語to be invited to speak here我覺得應邀在這兒演講是我的榮耀。Tom didnt find it difficult to write letters in Chinese. it 作形式賓語，代替不定式短語to write letters in Chinese湯姆發(fā)現(xiàn)用漢語寫信不難。All these noises made it impossible for me

36、to go on with the work. it 作形式賓語，代替不定式短語to go on with the work這些噪音使我無法繼續(xù)工作。 it代替動名詞短語( 這只限于少數(shù)句型，在多數(shù)情況下用不定式時更多一些)如：The professor considers it no good reading without understanding.這位教授認為閱讀而不理解沒有益處。Do you consider it any good trying again?你覺得再試會有好處嗎？He found it useless( no use) arguing with him.他發(fā)現(xiàn)和他辯

37、論沒有用。He thought it absolutely senseless attempting the impossible.想做不可能的事情，他認為是完全沒道理的。I dont think it worthwhile going to such a place.到這樣一個地方去我看是不值得的。 it代替賓語從句：如：We all thought it a pity that the conference should have been cancelled.會議取消了我們都感到很遺憾。I took it for granted that they were not coming.我想他

38、們準是不會來的了。Ill see to it that everything is ready in time.我負責使一切都按時準備好。 含it 的常用句型英語中有一些固定句型中含有it,應注意這些句型的使用。1. It be + 被強調(diào)局部 + that/ who + 其他成分強調(diào)句型可以強調(diào)一個句子的主語、賓語、表語及狀語等成分。如果被強調(diào)的成分是表示人的詞，可以用that或who(whom)連接其他成分；被強調(diào)的成分是表示人以外的詞，例如表示事物、時間或地點的詞，用that連接其他成分。例如我們可以用強調(diào)句型強調(diào)以下句子的主語如、賓語如、地點狀語如及時間狀語如I met Peter i

39、n Japan last year. It was I who/that met Peter in Japan last year. It was Peter whom/that I met in Japan last year. It was in Japan that I met Peter last year. It was last year that I met Peter in Japan.* not until 也可用于強調(diào)句型例1Mr Brown didnt come back until eleven oclock.可變?yōu)椋篒t was not until eleven oc

40、lock thatMr Brown came back.例2 The rain didnt stop until midnight.可變?yōu)椋篒t was not until midnight that the rain stopped.* 強調(diào)句也可變?yōu)樘厥庖蓡柧淅?It was in 1949 that the PRC was founded.可變?yōu)椋篧hen was it that the PRC was founded?例2 Your dad worked in this factory two years ago.可變?yōu)椋篧here was it that your dad worke

41、d two years ago?2Its + 地點狀語+ that 強調(diào)句Its +地點名詞+ where (定語從句)如：It is the town where I was born.(the town 為地點名詞，定語從句)這是我出生的鎮(zhèn)子。It was in the town that I was born.(in the town為地點狀語，強調(diào)句型)我出生在這個鎮(zhèn)子。3.Its + 時間名詞+ when(時間狀語從句) Its + 時間狀語 +that(強調(diào)句)如：It was at 8 oclock that he returned.(at 8 oclock是時間狀語，強調(diào)句)他

42、是在八點鐘回來的。It was 8 oclock when he returned.(8 oclock 是時間名詞，時間狀語從句)他回來的時候是八點鐘。4. if it is convenient to you 如果你方便的話如：If it is convenient to you, you can start tomorrow.如果方便的話，你明天可以動身。5. believe it or not 信不信由你如：Believe it or not, Ill go abroad next month.不管你信還是不信，我下個月要出國。Believer it or not, we were le

43、ft waiting in the rain for two hours.信不信由你我們冒雨等了兩個小時。6. Its time thatdid / should do (定語從句)如：It is time that I went and picked up my daughter from school.我該去學校接我女兒放學了。Its high time that we stopped/should stop this practice.我們確實該停止這種做法了。7. It is /has beensincedid(時間狀語從句)如：It is just a week since we a

44、rrived here.我們來這里已一星期了。8.It wont be before用不了多長時間就會It will bebefore得過多長時間才It wasnt before沒過多長時間就It wasbefore過了多長時間才It will be a long time before we finish the task.我們還需要很長時間才能完成這項任務。It wasnt long before he learned to use the computer.不久他就學會使用計算機了。It was some time before he told me about this affair.

45、過了一段時間之后他告訴了我這件事。It wont be long before we meet again.不久之后我們還會再見面的。 易混用其他句型英語中有一些句型不含it, 但卻易被誤用了it，常見的有以下句型： There is something/nothing wrong/ the matter with sb./ sth.如：There is nothing wrong /the matter with him. Hes just pretending.他沒什么事，他只是在裝呢。2. There is no doubt about對毫不疑心 There is no doubt th

46、at對毫不疑心如：There is no doubt about his suitability for the job.毫無疑問，他適合這個工作。There is no doubt about the fact.關于這個事實毫無疑心。There is no doubt that he is hard to deal with.毫無置疑他很難對付。 There is no need (for sb.) to do sth. 沒必要如：There was no need for him to remain in Paris.他沒有必要繼續(xù)留在巴黎。There is no need for you

47、 to start yet.你現(xiàn)在還不必動身。4.There is no/a possibility that 沒可能/有可能(= It is impossible/possible that )如：There is a possibility that the train may be late.可能火車要晚點。There is no possibility that well see him this weekend.我們本周末不可能見到他。 5.There is a chance that 可能如：There is a chance that the sick child will ge

48、t well.這個生病的孩子可能會好起來的。6.There be no/ some differences betweenand和之間沒/有區(qū)別如：There are some differences between the two languages.這兩種語言之間有些區(qū)別。7. After what seemed + 時間如：After what seemed a very long time, the wounded soldier came back to life.在經(jīng)過似乎很長的一段時間之后，那個受傷的士兵蘇醒了過來。8. There be difficulty/ trouble

49、(in) doing sth. 干有困難如：here was no difficulty in finding him.找到他沒費什么事。習題演練：1._ is reported that he got seven gold medals.A. ThatB. Word C. It D. News2.How long _ to finish the work?A. you will take B. will you take C. you will take it D. will it take you3._ no need for us to discuss the problem again

50、. It has already been settled.A. It has B. There has C. It is D. There is4.I was disappointed with the play. I had expected _ to be much better.A. that B. this C. one D. it5.I dont think _ possible to master a foreign language without much memory work.A. it B. that C. its D. this6.Does _ matter if h

51、e cant finish the job on time?A. this B. it C. he D. that7.-Do you need my ruler?-No, thanks. Ive got _ myself.A. it B. each C. one D. the one8.-Which person do you mean?-_ who wears a new gold watch.A. The one B. One C. Each D. It9.It _ three years since I left England.A. has been B. was C. had bee

52、n D. will be 10.It wont be long _ the island _ to our motherland.A. when, returns B. before, will return C. since, returns D. before, returns11.How many years is it _ your family moved here?A. after B. since C. before D. until12._ is a pity that you forgot both her address and her telephone number.A

53、. It B. There C. This D. That13.I saw no more than one copy left in the bookshop. Will you go and buy _?A. it B. some C. any D. one14.Will you see to _ that the luggage is brought back?A. me B. yourself C. it D. them15.It _ that she has lost interest in studying English.A. seemed B. appears C. looks D. remains16._ happened that I met one of my friends yesterday.A. IB. That C. It D. How17.I think _ right that you didnt tell him the bad news.A. it B. itsC. you D. that1