[中学联盟]《It最基本的用法》.ppt

It 的用法;It 最基本的用法是人称代词，主要代表刚提到的东西以避免重复。;It 可以表示“是谁（在某处或做某事）;替代词one, ones, that, those, it, this, that;The computers in our school are connected to the Internet while those in their school aren’t. The football players on our team seem to be more energetic than those on your team.;That/ those一般不带前置定语，但必须有后置定语。One/ones 都可。当替换词的后置定语用所有格的of短语或当替换词被 所有格修饰时，不用one/ones而用that of/those of.;2) it, this 和 that;We keep the ice cream machine in the spare room. It is mainly used by the children. (指 the machine) We keep the ice cream machine in the spare room. This/ That is mainly used by the children. (指the spare room);3) It和one;形式主语it：有下面几种类型：;用于由that 引导的主语从句，有下面几种类型：;形式宾语it:;用it跟从句用法：;5）it +动词be +that从句 No, it couldn’t be that they were interested in him. 6）It +be + 一点时间+ when… It was Christmas Eve when I got the news of his being killed in a car crash. 7）It +be+一段时间+ since… It is/has been three week since I last heard from him. 8）It is time to do/ that…(谓语用过去时态） It is time for us to give the house a thorough cleaning. It is time that we gave the house a thorough cleaning.;9）It + be + the first/second time that…(谓语动词用完成时态） It is the first time in history that two Nobel Prizes have been awarded to the same person. 10）It takes sb. Time to do… It took Mary 20 minutes to choose a suitable dress for the party.;Nancy saw your sister in Tokyo last week. It was Nancy who saw your sister in Tokyo last week. It was your sister whom Nancy saw in Tokyo last week. It was in Tokyo that Nancy saw your sister last week. It was last week that Nancy saw your sister in Tokyo.;有些否定句也可以改成这种强调结构： I didn’t hear from her until last summer. It wasn’t until last summer that I heard from her. I didn’t do all this for myself. It wasn’t for myself that I did all this.;Ex:把下列句子改为强调句： 1. Peter saw his friend in the park yesterday. 2. I didn’t receive my letter until yesterday? 4. Did it happen in 1980? 5. Why does everyone think I’m narrow-minded ?;