It的用法总结

1、It 的用法总结一 . 代词 : 1) 指代上文2) 指代 this/that3) 指代未知性别的婴儿或孩子或身份不明的人4）指代时间 / 地点/ 天气/ 温度/ 距离/ 环境What does “ it”refer to?1.It gets dark very early in the winter.2.What will you callit if it s a boy?3.I love spring-It s a wonderful time of the year.4.It s less than 100 kilometres from here to Jinan.5.When the

2、 factory closes,it will mean 500 people losing their jobs.6.Whats this?It s a cat.7.It has snowed much this year.注意： it, one 和 that, those 作替代词的区别(1)The book in your bag is very interesting. Can I borrow ?(2) The book in your bag is more interesting than _ on the desk.(3) The weather here is much co

3、lder than_ in Nanjing.(4) The books are free. You can take_ free of charge.(5) The books in the bag are better than _ on the desk.it 表示特指，与前面指代的名词是同一个one 表示泛指，指代单数可数名词，与指代的名词同类但不同一个that 表示特指，相当于the+名词单数，与指代的名词同类但不同一个those表示特指 ,相当于 the+复数可数名词 , 与指代的名词同类但不同一个it 指时间的几个重要句式【句式 1】 it is /has been + 段时间+

4、since - 自从 - 多久了? It is / has been 3 years since I visited your company.【句式 2】 It was + 段时间+ before - 过了多久 -才 -? It was 3 hours before he realized the truth.【句式 3】 It will be + 段时间+ before - 要过多久 -才 -? It will be 3 months before they complete the bridge.【句式 4】 it was + 点时间+ when - 某事发生于 -某一时刻It was

5、10 o clock when the big fire broke out .【句式 5】It /this is/was the + 序数词 + time + 现在完成时态 / 过去完成时 -（表示某人第几次做某事）? 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（该是干 的时候了）It is time that we went to school.对比训练1. It will be years _ we meet ag

6、ain.2. It is ten years _ I came to this town.3. It is ten years ago _ I came to this town.4. It is the third time _ I _ (visit) to this town.5. It was 2 am. _Tangshan earthquake took place.A. whenB. that C. beforeD. since二. 引导词 : 1)形式主语2)形式宾语3)强调句It 作形式主语基本结构：It + be/v. + (for sb/ of sb.) to do sth

7、动(词不定式 )doing sth（.动名词短语）that/ whether （从句）注意 1：: For or Of ?1. It is important_ us to learn English well.2. It is very kind _ you to help me learn English.3. It is foolish _ you to believe him.4. It is necessary _ you to go over this lesson.注意2; It何时代替doing?It +be +no useno good+ doing stha waste o

8、f time翻译：1. 和他争论没有用。 _2. 打电脑游戏是浪费时间。 _注意 3：that后的从句要用虚拟语气（should +动词原形），should 可以省(1). It is a pity (a shame /an honor /a good thing/a fact /a surprise/. ) that .(2). It is important ( necessary， strange，natural.) that .(3).It is insisted(ordered/commanded,suggested/advised/proposed,demanded/request

9、ed/required. ) that .注意 4： He is said/ reported to have gone abroad.=It is said/reported that he has gone abroad.All the students are believed to have done their best.=It is believed that all the students have done their best.注意 5：It + vi.( 不及物动词 ) + thatIt happens that he was out.It seems that he d

10、oesn t know the secret.It appears that he is honest.It occurred to me that I lost my purse on the bus.It doesn t matterwhether he will come or not.碰巧 好像 好像 我突然想到 没有关系It 作形式宾语基本结构：动词 + it +形容词/ 名词+ （for/of sb +）to do(动词不定式)thinkdoing sth（动名词短语）believethat从句（从句）findnecessaryfeelpossibleconsidernatural

11、,supposeno use/no good/makea waste of timekeepI think it important to make a summary in time.I find it a good habit that we make a summary in time.He felt it no use learning English without speaking it.it 作形式宾语的特殊句型：V.+ it + if/that/when动词有喜欢类：enjoy, like, appreciate, prefer讨厌类： hate, dislikeI would

12、 appreciateit if you paid in cash.I like it in the autumn when the weather is clear and bright. I hateit when people talk with their mouths full.It 引导强调句1. 基本结构： It is/was +被强调部分+ that /who( 人 ) .例如：他是因为病了才没能帮我It was because he was ill thathe couldn Was it because he was ill thathe couldn t help me. t help me?Why was it that he couldn t help me?2. not until 句式的强调句型：It is/was not until+ that . “直到 才 ”例如： He didn t get home until it was dark.，三用在固定结构中的ittake it easy.别紧张take it for