精选优质文档-倾情为你奉上It的用法解析1.it在强调句中用法：It is + 被强调部分 + that 该句型是强调句型，被强调部分可以是主语、宾语、表语或状语；强调的主语如果是人时，that可以由who换用；如果把这种句型结构划掉后，应该是一个完整无缺的句子，这也是判断强调句型与其它从句的依据；It was they that cleaned the classroom yesterday.昨天是他们打扫的教室。（强调主语）It is her sister that I have fallen in love with.我爱上的是她的姐姐。（强调宾语）It was under the tree that he found his missing purse.他是在树底下找到自己丢失的钱包。（强调地点状语）It was last week that I visited the Shanghai Expo.我是上周参观的上海世博。（强调时间状语）It is not until + 被强调部分 + that
