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it的用法、常用句型,知識梳理,it可以作代詞（如人稱代詞、非人稱代詞）和引導(dǎo)詞，也可以用于強(qiáng)調(diào)句式中，還可以用于一些固定表達(dá)中。 一、it作代詞 1. 用作人稱代詞，指代：①上文提到過的人、事、物或情況等；②嬰兒、性別不明或沒必要區(qū)分性別的人或動物。此外，it也可指代未知的人。如： In my opinion, life in the twenty-first century is much easier than it was used to.,Someone is ringing the doorbell. Go and see who it is. It’s John on the phone. 2. 用作非人稱代詞，指時(shí)間、天氣、距離或自 然現(xiàn)象等。如： It is only half an hour’s walk to the hospital. It’s about two kilometers from here to the station. It is raining heavily outside. 二、it作引導(dǎo)詞 1. it作形式主語的常用句型,★ “It + be +名詞+主語從句”中從句謂語常用“（should +）動詞原形”。常用于本句型的主要有a pity, a shame, no wonder, no accident等。如： It is a great pity that he should be so greedy. It is a shame that he should attempt to injure the reputation of an honest man. It was no accident that such a book should appear in the 18th century. ★ “It + be +形容詞+主語從句”中從句謂語常用“（should +）動詞原形（或完成時(shí)）”。常用于本句型的形容詞主要有impossible, strange,,surprising等。如： It is impossible that it should be a mere coincidence. It’s strange that she should have been arrested for stealing. It was surprising that he should have finished writing a novel in only twenty days. ★ “It +動詞（+賓語或狀語）+主語從句”。常用于本句型的動詞主要有please, happen等。如： It pleased me very much that he succeeded.,It pleases me that he should want to talk with me. It so happened that he had just left for Tianjin. ★ “It +動詞的被動語態(tài)+主語從句”。常用于本句型的動詞主要有accept, admit, allow, announce等。如： It’s accepted that the universe is endless. It is generally admitted that he is a trustworthy person. It was announced that all prisoners would be set free.,It was announced that the Prime Minister would speak on television that evening. 2. it作形式賓語 ★根據(jù)句子結(jié)構(gòu)的需要，人們常用it作形式賓語，而將真正的賓語放在賓語補(bǔ)足語后。常用于這種句型的動詞有believe, bring, consider, declare, feel, find, make, prove, think等。如： I find it amazing that anyone would want to listen to that music. I don’t think it possible to master a foreign language within 3 months. I found it worthwhile reading this book.,★it作形式賓語的常用句型： 1）動詞+ it + if / when從句 當(dāng)enjoy, like, dislike, love, hate, prefer, appreciate等動詞后需要接一個(gè)if或when引導(dǎo)的從句時(shí)，需要在動詞后接it作形式賓語。如： She won’t like it if you arrive late. He hates it when people use his bike. I’d prefer it if I didn’t have to do so much work. I would appreciate it very much if you would help me with it.,2）動詞+介詞+ it + that從句 能用于此句型的主要有：depend on, answer for, see to。如： You may depend on it that he will turn up in time. I can’t answer for it that the boy is honest. I’ll see to it that all these letters will be sent to the post before twelve. 三、it用于強(qiáng)調(diào)句型中 強(qiáng)調(diào)句型可以對句中除謂語動詞以外的成分加以強(qiáng)調(diào)。,四、it用在一些固定表達(dá)中 As someone puts it, . 像某人所說的那樣 Please see to it that . 請務(wù)必…… When it comes to . 當(dāng)提到……時(shí) It looks / seems as if . 看起來好像…… It’s time for sth. 該做某事了 It’s time (for sb.) to do sth. （某人）該干某事了 It is (high) time that . （早就）該…… It’s first / second / third / . time + that . 這是某人第幾次干某事（從句謂語用現(xiàn)在完成時(shí)）,It is / has been +一段時(shí)間+ since . 自從……已經(jīng)……； It wasn’t / won’t be long before . 沒過多久就 / 很快…… It’s + 時(shí)間段 + before . 過……時(shí)間才…… 五、it與one的區(qū)別 兩者均可代替前面提到的事物，區(qū)別是：it指的是與前面已提到的事物為同一物，此時(shí)的it等于“the +名詞”；而one 指的是與前面已提到的事物為同一類物，此時(shí)的one等于“a +名詞”。如： I have a dictionary but I’ve lent it to Mary. I haven’t a dictionary; can you lend me one?,鞏固練習(xí),I. 選用括號內(nèi)合適的單詞填空。 1. It was only after she had begun to carry out the task ________ (that, when) Mary realized it was extremely difficult to complete. 2. ___ (It, As) is our belief that we can make a good life if we work hard. 3. ___ (It, What) is suggested that parents should pay more attention to their children’s inner world.,that,It,It,4. As a matter of fact, _____ (that, it) is not failure itself, but what we think of failure and what we do afterwards that counts. 5. —Do you still drive your Ford car? —No, I sold ____ (it, that) two years ago. 6. You must keep ____ (it, what) in mind that you can never be too careful when proofreading the newspaper. 7. Will ____ (that, it) be convenient for you to start work tomorrow?,it,it,it,it,8. ______ (There, It) is no doubt that the visiting team, which has better players, will win the match. 9. —I don’t think I can work out the maths problem. It’s too difficult. —Think it over, and perhaps you will make ________ (it, that).,There,it,II. 用there或it的正確形式填空。 1. During my stay there I made ____ a rule not to eat fatty foods. 2. I’d appreciate ____ if you could help me find out the reason why the computer doesn’t work. 3. I kept telling Mary not to stay up too late any more, but ____ didn’t help. 4. _____ is an urgent need for qualified teachers. 5. I like ____ when I am with people like Mr. Ma, who is always willing to help others.,it,it,it,There,it,6. —Who is making loud noises outside the window? —______ is Tom, my neighbour’s son. 7. ________ was no point in staying any longer. 8. I’m as good a cook as she is except when _____ comes to making pizza. 9. I have no idea who ____ was that taught me the trick, which helped me to solve the problem. 10. ________ is a hard job for such a little boy to carry the heavy box upstairs. Let’s give him a hand.,It,There,it,it,It,III. 選用正確的詞完成下面短文。,it, these, that, what, the,Do you have a drawer or a box of your special stuff? 1. _____ may look like junk to anybody else, but to you 2. ____ may be very important. Maybe 3. ________ is your set of last year’s hockey cards, a bottle top you hoped would show the winning number, the smoothest pebbles you could find on the beach, and your class photo. If you have kept things like 4. ________, then you are a collector! Some people might call 5. ________ collection junk,,it,it,It,these,the,but you can call 6. _____ MEMORABILIA (MEM-or-a-BILLY-a) (值得紀(jì)念的事物). That sounds more impressive, doesn’t 7. ________? If you think about 8. ________ happens when you look through your collection, you might guess what memorabilia are. Sometimes just looking at one of your special things helps to trigger (觸發(fā)) a memory of how you got 9. ________. In most kinds of collections 10. ________ is easy to see how the items belong together.,it,it,what,it,it,If you collect stamps, anybody can see how they make a collection. 11. ________ is not so easy for somebody else to understand how your memorabilia make a collection. That’s why other people think they are junk. But they do belong together because they are all part of your life. They are part of that special something 12. _____ makes you different from anybody else.,It,that,從A、B、C、D四個(gè)選項(xiàng)中，選出可以填入空白處的最佳選項(xiàng)。 1. Sarah made _____ to the airport just in time to catch her plane this morning. A. herself B. this C. that D. it,2. New technologies have made _____ possible to turn out new products faster and at a lower cost. A. that B. this C. one D. it 3. The employment rate has continued to rise in big cities thanks to the efforts of the local governments to increase _____. A. them B. those C. it D. that,4. Why don’t you bring _____ to his attention that you’re too ill to work on? A. that B. it C. this D. him,