代詞it句型總匯

1、7. It構(gòu)成的句型小結(jié)一、It作形式主語的句型：為使句子平衡，往往把it置于句首作形式主語，而把真正的主語（通常是不定式短語、動(dòng)名詞短語或主語從句）移至句末。It 作形式主語的句型有：1. It takes + (sb.) + sometime / some money + to do sth.做某事花去某人多長(zhǎng)時(shí)間Just a minute, it wont take me long to change. 等一下,我很快就可以換好衣服。It took me three days to prepare for the examination. 我花了三天準(zhǔn)備那次考試。It takes a l

2、ot of money to buy a house like that. 買那樣一幢房子需要很多錢。It took great imagination as well as patience for Annie to teach me to speak.對(duì)安妮來說，教我說話需要極大的信心和想象力。2. It is +形容詞+ (for / of sb.) to do sth. 某人做某事是 的常用于該句型的形容詞比較多。for sb. 的句型 常用于表示事物的特征特點(diǎn)，表示客觀形式的形容詞，如easy, difficult, hard, important, possible, imposs

3、ible, comfortable, necessary, better等。of sb的句型一般用表示人物的性格，品德，表示主觀感情或態(tài)度的形容詞，如kind, nice, stupid, rude, clever, foolish, thoughtful, thoughtless, brave, considerate(考慮周到的), silly, selfish(自私的) 等。It was kind of you to help us. 謝謝你對(duì)我們的幫助。It is getting harder every day for a lazy man to get a living.懶漢謀生是

4、越來越困難了。What time would it be most convenient for me to call again?什么時(shí)候我再給你打電話最合適？Its very thoughtful and kind of you to offer me this lovely holiday.你能給我這么美好的假日，實(shí)在是想得太周到、友善了。3. It is +名詞+ to do sth. 做某事是 的常用于該句型的名詞有：manners, duty, fun, good, a great honour等。As a student, it is bad manners to come la

5、te to class.作為學(xué)生，上課遲到是沒有禮貌的。It is our duty to pay taxes to our government.向政府交稅是我們的義務(wù)。It is his turn to take the children to school.今天該輪到他送孩子們上學(xué)了。4. It is + up to sb. + to do sth. 做某事是某人的責(zé)任或義務(wù)Its up to us to give them all the help we can.我們理應(yīng)竭盡所能地給予他們幫助。Its up to you to decide whether to go or not.應(yīng)

6、該由你決定是否去。5. It is +名詞+ doing sth. 做某事是 用于該句型的名詞有：no good, no use, hard work, a waste of time, a great honour等。用于該句型的形容詞有：pleasant, useless, senseless, worthwhile, dangerous等。Its no use/good (in) crying over spilt/spilled milk.事已至此，后悔也無用。（牛奶已潑，哭也沒用。）It is hard work keeping the grass green at this tim

7、e of year.這個(gè)季節(jié)還使草保持綠色真是不容易。Its a waste of time your talking to him.你和他談話是浪費(fèi)時(shí)間。Its dangerous playing with fire.玩火是危險(xiǎn)的。Is it worthwhile making such an experiment?做這樣的實(shí)驗(yàn)值得嗎？6. It is +名詞+ that從句用于該句型中的名詞有：a pity, a shame, a fact, an honour, a wonder, a good thing, good news, no wonder等。慣用句型有：It is commo

8、n knowledge that 是常識(shí)It is a surprise that 令人驚奇的是It is a fact that 事實(shí)是It is no wonder that 難怪 It is a pity that she has made such a mistake.真遺憾，她犯了這樣一個(gè)錯(cuò)誤。It is a thousand pity/ thousand pities that he missed the chance.他錯(cuò)過了這次機(jī)會(huì)真是太可惜了。It is no wonder that he has passed the examination. 難怪他考試及格了。It is

9、a shame that you have to leave so soon. 你必須這么早離開，真遺憾。It is a great honour that he receive that prize.他得到了那個(gè)獎(jiǎng)?wù)媸菬o上的榮耀。7. It is +形容詞+ that從句 是 用于該句型中的形容詞有：clear, obvious, true, certain, important, strange, natural, surprising, fortunate, good, wonderful, funny, possible, impossible, likely, unlikely, q

10、uite clear, unusual等。慣用句型有：It is necessary that 有必要It is important that 重要的是It is obvious that 很明顯It is important that we (should) learn English well.我們學(xué)好英語是非常重要的。It is necessary that the students (should) remember all the new words.學(xué)生記住所有的新單詞是必要的。8. It is + -ed分詞+ that從句 據(jù) 是 的常見的過去分詞有：said, reporte

11、d, learned, announced, known, decided, expected, believed, considered, declared, felt, hoped, seen, supposed, thought, understood等。慣用句型有：It is said that 據(jù)說It is reported that 據(jù)報(bào)道It is believed that 大家相信It is hoped that 大家希望It is well known that 眾所周知It is thought that 大家認(rèn)為It is suggested that 據(jù)建議It h

12、as been decided that 大家決定It must be remembered that務(wù)必記住的是It is reported that another man-made satellite has been put into orbit.據(jù)報(bào)道，又有一顆人造衛(wèi)星被送入軌道。It is said that he has gone to the USA for further study. 據(jù)說他已去美國(guó)深造了。It is known to all that light travels in straight lines. 眾所周知，光以直線運(yùn)行。It has been deci

13、ded that we should design the machine ourselves.已經(jīng)決定我們自己來設(shè)計(jì)這部機(jī)器。9. It +及物動(dòng)詞+名詞+從句It makes no difference to me whether its foggy or clear.對(duì)我來說，天氣有霧或晴朗沒什么關(guān)系。It doesnt make any difference to me whether he goes or not.不管他是否去對(duì)我都沒有什么影響。10. It +不及物動(dòng)詞+ that分句常見的不及物動(dòng)詞有：seem, happen, look, appear, come about,

14、 turn out, occur等。慣用句型有：It appears that似乎 It (so) happens (that)（那么）碰巧It occurred to me that 我突然想起It happened that he wasnt there. (= He happened not to be there.)碰巧他不在哪兒。It doesnt matter to me what he says.對(duì)我來說，他說什么都無所謂。It doesnt seem to matter much whether he received the gift or not.他是否接受這件禮物似乎都無

15、所謂。注意：It is demanded / necessary / a pity + that結(jié)構(gòu)中的主語從句的謂語動(dòng)詞要用should 加動(dòng)詞原形， should 可省略。 (1) suggested, ordered, proposed, required, demanded, requested, insisted + (should) do(2) important, necessary, natural, strange + (should) do(3) a pity, a shame, no wonder + (should) doIt is suggested that we

16、(should) hold a meeting next week.It is necessary that he (should) come to our meeting tomorrow.二、It 作形式賓語的句型1. sb find/ believe/ think/ feel/ consider/ make + it +n/adj +to do或從句該句型中的it 作形式賓語。為了記憶方便我們可稱該句型為“6123結(jié)構(gòu)”。6 指主句中常用的動(dòng)詞：think, believe, make, find, consider, feel；1 指的是形式賓語 it；2 指的是賓補(bǔ)的兩種形式：形容詞

17、或名詞；3 指的是真正賓語的三種形式：不定式短語，動(dòng)名詞短語或that引導(dǎo)的賓語從句。Eg: We think it our duty to clean our classroom every day.He felt it important learning English well.They found it difficult that they would finish their work in two days.2. 主語hate / dislike / love / like it when從句Eg: I hate it when people speak with their

18、mouths full.3. 主語appreciate it if從句Eg: I really appreciate it if you could help me with my math.4. sb. depend on/count on/rely on/ see to(負(fù)責(zé)，確保) / answer for it that Eg: You may rely on it that he wont be late. You must see to it that the doors are locked before you leave the lab.5. sb. take it for

19、granted that 認(rèn)為是理所當(dāng)然的 Eg: I take it for granted that he will succeed.三、It 引導(dǎo)的時(shí)間句型1 It is+ 時(shí)間段 + since引導(dǎo)的時(shí)間狀語從句: （從句用過去時(shí)）該句型中從句一般用過去時(shí)態(tài)，句意為“自從.以來已多久了”Eg : It is 5 minutes since the bus left. 公汽開走已有5分鐘了2 It was/will be + 時(shí)間段 + before引導(dǎo)的時(shí)間狀語從句: （主從句時(shí)態(tài)一致）該句型中，主句謂語動(dòng)詞be若為肯定式，意為“過多久才.”；若為否定式時(shí)，意為“沒過多久就.”。Eg

20、: It will be 3 hours before he comes back.要過三個(gè)小時(shí)他才會(huì)回來It was 3 hours before he came back. 過了三個(gè)小時(shí)他才回來3 It was / will be + 時(shí)間點(diǎn) + when引導(dǎo)的時(shí)間狀語從句 （it等于時(shí)間，時(shí)間前無介詞）這個(gè)句型中, it 代指時(shí)間，表示時(shí)間點(diǎn)的詞前沒有介詞。Eg : It will be Monday when he comes back. 他周一的時(shí)候回來. It was Monday when he came back. 他周一回來的.對(duì)比：It was on Monday that

21、 he came back . (強(qiáng)調(diào)句)4 It + is (about/high) time +(that) sb did/should do sth 意為“該是某人做的時(shí)候了”， about/high是用于加強(qiáng)語氣，that從句用should或動(dòng)詞一般過去時(shí)表虛擬。亦可轉(zhuǎn)換成 It + is+ time +(for sb )to do sth.Eg : Its (high/about) time (that) we handed in/should hand in our homework.5 It / This / That +is+ the first(second ) time +

22、 that sb has done sth: 意為“這是某人第次做”，注意time前有序數(shù)詞，主句是 is 時(shí) ，從句要用現(xiàn)在完成時(shí)；如果主句用was ，則從句須用過去完成時(shí)。Eg : It is the third time that I have seen the film. That was the second time that I have been there.四、 It 引導(dǎo)的強(qiáng)調(diào)句: It + is/was +被強(qiáng)調(diào)的部分+ that/who 從句 Eg: It was last week that I met an old friend in the street.It was because he was ill that he didnt come to school yesterday.