it的用法總結(jié)

1、It的用法總結(jié)一 代詞：1)指代上文2) 指代 this/that3) 指代未知性別的嬰兒或孩子或身份不明的人4) 指代時間/地點(diǎn)/天氣/溫度/距離/環(huán)境What does “ it refer to?1.It gets dark very early in the wi nter.2. What will you call it if it s a boy?3.I love spring-It s a wonderful time of the year.4.It sless than 100 kilometres from here to Jinan.5. When the factory

2、 closes, it will mean 500 people losing their jobs.6. Whats this?It s a cat.7.It has sno wed much this year.注意：it,?one和that, those作替代詞的區(qū)別？(1) The book in your bag is very in terest ing. Can I borrow?(2) The book in your bag is more in teresti ng tha non the desk.(3) The weather here is much colder t

3、hanin Nanj ing.(4) The books are free. You can takefree of charge.(5) The books in the bag are better tha non the desk.it表示特指，與前面指代的名詞是同一個one表示泛指，指代單數(shù)可數(shù)名詞，與指代的名詞同類但不同一個 that表示特指，相當(dāng)于the+名詞單數(shù)，與指代的名詞同類但不同一個 those表示特指,相當(dāng)于the+復(fù)數(shù)可數(shù)名詞，與指代的名詞同類但不同一個it指時間的幾個重要句式【句式1 it is /has been + 段時間 + since自從多久了? It is

4、/ has been 3 years since I visited your company.【句式2 It was +段時間+ before -過了多久 才-? It was 3 hours before he realized the truth.【句式3 It will be +段時間+ before -要過多久-才-? It will be 3 months before they complete the bridge.【句式4 it was +點(diǎn)時間+ when -某事發(fā)生于-某一時刻一It was 10 o clock when the big fire broke out .

5、【句式5 It /this is/was the +序數(shù)詞+ time +現(xiàn)在完成時態(tài)/過去完成時-(表示某人第幾次做某事)? It is the second time I have heard of this .【句式 6 It is time (about time /high time ) that sb. did /should do(該是干的時候了)It is time that we went to school.對比訓(xùn)練1. It will be yearswe meet again.2. It is ten yearsI came to this town.3. It is

6、ten years agoI came to this town.4. It is the third timeI(visit) to this town.5. It was 2 am.Tangshan earthquake took place.引導(dǎo)詞：1）形式主語2）形式賓語3）強(qiáng)調(diào)句It作形式主語基本結(jié)構(gòu)：It + be/v. +(for sb/ of sb.) to do sth (動詞不定式) doing sth.(動名詞短語) that/ whether(從句)注意 1: : For or Of ?1. It is importa nt us to lear n En glish

7、well.2. It is very ki ndyou to help me learn En glish.3. It is foolishyou to believe him. _4. It is n ecessaryyou to go over this less on. _注意2; It何時代替doing?It +be + no useno good+ doing stha waste of time翻譯：1. 和他爭論沒有用。 2. 打電腦游戲是浪費(fèi)時間。 注意3: that后的從句要用虛擬語氣(should +動詞原形)，should可以省(1) . It is a pity (a

8、shame /an honor /a good thing/a fact /a surprise/. ) that .(2) . It is important ( necessary , strange, natural.) that .(3) .It is in sisted(ordered/comma nded,suggested/advised/proposed,dema nded/requested/required. ) that .注意 4： He is said/ reported to have gone abroad.=It is said/reported that he

9、 has gone abroad.All the students are believed to have done their best.=It is believed that all the stude nts have done their best.碰巧好像好像我突然想到?jīng)]有關(guān)系注意5: It + vi.（不及物動詞）+ thatIt happens that he was out.It seems that he doesn t know the secret.It appears that he is honest.It occurred to me that I lost m

10、y purse on the bus.It doesn t mattewhether he will come or not.It作形式賓語基本結(jié)構(gòu)：動詞+ it +形容詞/名詞0+ ( for/of sb + ) to do(動詞不定式)thinkI1doing sth （動名詞短語）believe?1that從句（從句）find?necessaryfeel?possibleconsidernatural,supposeno use/no good/make?a waste of timekeep ?I think it important to make a summary in time

11、.I find it a good habit that we make a summary in time.He felt it no use learning En glish without speaki ng it.it作形式賓語的特殊句型：V.+ it + if/that/when動詞有喜歡類：enjoy, like, appreciate, prefer討厭類：hate, dislikeI would appreciate it if you paid in cash.I like it_ in the autumn when the weather is clear and br

12、ight.I hate it when people talk with their mouths full.It引導(dǎo)強(qiáng)調(diào)句1. 基本結(jié)構(gòu)：It is/was + 被強(qiáng)調(diào)部分 + that /who（人）.例如：他是因為病了才沒能幫我It was because he was ill that he couldn t help me.Was it because he was ill that he couldn t help me?Why was it that he couldn t help me?2. not until句式的強(qiáng)調(diào)句型：It is/was not until + that .直到才”例如： He didn t get home until it was dark.三.用在