代詞it的用法匯總課件-高考英語一輪復(fù)習(xí)

1、It的用法大全一、人稱代詞1.it的最基本用法是作代詞，主要指剛提到的事物，以避免重復(fù): They watched the train until it disappeared in the distance.2.也可以指動物或嬰兒(未知性別的嬰兒或孩子): Is this your dog？No, it isnt.They got a baby and it was a ten-pounder3.也可指抽象事物或指抽象環(huán)境和情景:I hate it when people talk with a full mouth.二.非人稱代詞it有時并不指具體的東西而泛指天氣、時間、日期、距離、價值、

2、度量、溫度、環(huán)境等： .指天氣：It is a lovely day, isnt it? .指時間: It was midnight when she came back.指日期: It is April First today. .指距離: It is some 3000 kilometers from A to B.指價值: It is three dollars. .指溫度: Today it is 30 degrees centigrade. 三.作形式主語，替代主語從句，動詞不定式，或動名詞短語：1.作形式主語替代主語從句It is clear ( obvious,true, pos

3、sible, certain. ) that從句 It is very clear that hes known the truth. (2)It is said (reported/believed/thought/known.) that 從句 It was reported that another earth satellite had been put into orbit. (3)It is a pity ( a shame /an honour/a good thing/a surprise/no wonder . ) that從句. It is a pity that he i

4、s ill. (4)It is the first ( second . ) time that從句(從句用現(xiàn)在完成時 have done );是第一（二）次。It was the first ( second . ) time that從句(從句用過去完成時 had done )It is the first time that I have been here. It was the last time that they had seen her.(5)It is （hight/about） time that從句(動詞用過去時did): 該干某事了 It is time that ch

5、ildren went to bed.(6)It happens (seems， looks， appears ) that從句.It happened that he met his teacher in the street. 碰巧. It seems that he will be back in a few days. 看來 (7)It occurs to/comes to/ strikes/ hits sb. that從句. “某人突然想起.” It occurstomethat Iforgottolockthe door!Ithitme thatthisforeignerwasth

6、e oneIsawinthesupermarket!2.作形式主語替代不定式. It is +形容詞+ ( of sb. ) to do sth. 常見的詞有： bad ， brave ， careless， clever ， cruel ， foolish ， good ， honest ， horrible ， kind ， lazy ， modest ， naughty ， nice， polite， rude ， silly ， stupid ， wise . It is kind of you to say so.It was stupid of him to do that.It

7、is +形容詞+ ( for sb. ) to do sth. . 常見的形容詞有： important, necessary， natural, easy ， safe ， common ， normal ， hard ， difficult ， dangerous . It is dangerour for children to play with fire.It takes sb. . to do sth. 花費.做某事It took thousands of people many years to build the Great Wall.It takes much energy

8、to learn English well. 3. 作形式主語替代動名詞短語It is no good / no use / useless doing sth. It is no good learning English without speaking English. Its useless arguing with a man like Shylock.四、作形式賓語，代替不定式，動名詞短語或賓語從句。該結(jié)構(gòu)中常用的動詞有：think, believe, make ,find consider, feel； 1.We think it important to learn a for

9、eign language.2.He felt it no use learning English . 3.They found it difficult that they would finish their work in two days.4.They made it clear that they wouldnt like to go with you.5.But spending too much time online is unhealthy and makes it very difficult to focus on other things in life.五、.it的

10、重要句型 1.強調(diào)句型: It is/was + 被強調(diào)部分 + that 從句 (被強調(diào)的主語如果是人，that可以由who換用)It was about 600 years ago that the first clock with a face and an hour hand was made. It was I that (who ) cleaned the classroom yesterday.It is generally believed that it is humans activities that lead to the global warming.2. It +

11、be+時間段+since從句意為“自從.以來已多久了”It is five years sinc she left lingyi.It has been years since we last met.3. It + be+時間段+before從句意為“多久才.”It will be five hours before we finish the work.It wont be long before we meet again.4.主語+動詞+it+ when/if從句能用于這類句式的的動詞有enjoy, hate, love, like, dislike, appreciate, pref

12、er 等，如：I hate it when people talk with a full mouth.I d appreciate it if you give me the chance. I would prefer it if you didnt smoke in here.I cant help it if he is always late.5. see to it that 從句 Ill see to it that all these letters will be sent to the post before twelve. （負(fù)責(zé)） Will you see to it

13、that my children are taken good care of while I am away? （注意；確保）6.depend /rely/count on it that 從句 (依靠/指望) You may depend on it that he will turn up in time. 7.answer for it that 從句（負(fù)責(zé)） I cant answer for it that the boy is honest. 六、It的一些習(xí)慣用法1.when it comes to.當(dāng)提到時2.As someone puts it, . 像某人所說的那樣3.I

14、t looks / seems as if . 看起來好像4.Please see to it that . 請務(wù)必5.Think it over 考慮考慮6.Make it 辦到；做成；成功7.Give it a try. 嘗試一下。8.Thats it . 這就對了。9.Just do it. 想做就做；堅持不懈10.Go for it. 努力爭??；大膽一試14.It is all over with sb. .全完了。15.Fight it out.堅持到底。16.Beleive it or not. 信不信由你。12.I cant help it. 我沒有辦法。13.Hows it g

15、oing？近況如何？11.Take it easy. 別著急；慢慢來17.let it go算了吧.18.Forget it . 忘了吧；別再想了19.（Ill） take it. 成交； 我買了。 20.I take it that.我認(rèn)為.21.Take it up .行動起來22.Got it. 知道了；做到了；成功了23.How is it with your study? 學(xué)習(xí)好嗎？1.If you are time poor , you need run for only half the time to get the same benifits as other sports

16、, so perhaps we should all give _ a try.2.Sarah made _ to the airport just in time to catch her plane this morning.3.New technologies have made _ possible to turn out new products faster and at a lower cost.4.The employment rate has continued to rise in big cities thanks to the efforts of the local

17、governments to increase _.5.Why dont you bring _ to his attention that youre too ill to work on?真題再現(xiàn)ititititit6.Online shopping websites and social media apps have made _ much easier for the public to spend more on gifts for their loved ones.7.Many westerners who come to China cook much less than in their own count