Unit3　Grammar精品课件（新人教选修6）.ppt

新课标人教版课件系列;The fourth period;教学it的用法;1.做形式主语; be+名词； e.g. It is a good idea to have a little notebook handy.手边有个小笔记本是个好主义。 be+介词短语； e.g. It is against the law to do that.这样做是违法的。 其他类型的谓语 e.g. It gives me great pleasure to see the movie.观看电影让我很高兴。 ;（2）动名词;（3）主语从句; 也可能是wh-词引导的;2.作形式宾语。;e.g. I think it no use arguing with him.我认为和他争吵没有用。 I found it very interesting to study English.我发现学英语非常有趣。 He made it clear that he was not interested in this subject.他非常清楚地表示他对那门学科不感兴趣。;3.用于强调结构;e.g. It is Prof.Lin who teaches us English.（强调主语） It is English that Prof.Lin teaches us（强调宾语） ;It was in shanghai that I saw the film.（强调状语） It was in 2001 that I went to university. （强调状语） ;4.用作人称代词。;5.作为非人称代词;（3）泛指时间 e.g. It was nearly midnight when she came back. （4）泛指环境 e.g. It is noisy here. （5）泛指距离 e.g. It is half an hour’s walk to the city center. ;6.用于某些习语;catch it 被责骂；受处罚;7.It的一些习惯用法;Homework