It的用法总结.doc

It的用法归纳一、It用作实词表达以下概念:指代前文提到的事物,前文中的this,that;替代前文中的内容;指代一位性别不明的小孩或未知的人;指代未指明但谈话双方都知道的那件事;指代时间、天气、气候、距离等自然现象。二、It用作形式主语替代作主语的从句、动词不定式、动名词,而把真正作主语的从句、动词不定式、动名词置于句尾。It作形式主语的常见句型:,其句型为(1)Itbeadj.(forsb.)todosth.(2).(3)It替代作主语的动名词的常见句型:It’snogood/usedoing…It’s(well)worthdoing…It’s(well)worthone’swhiledoing/todoIt’s(well)worthwhiledoing/(1)Itis+noun+从句(2)Itisadj.+clauseIt’ssurprisingthat…(should)………竟然……It’sapity/shamethat…(should)………竟然…(3)It+V.+sb.+clause=Itisv-ing+clauseIt+surprise/delight/interest/disappoint/worry/disturb/annoy/amaze/bother/concern/frighten/please/…(4)It+V.(tosb.)that…=sb/sth+V.+todo(V.:appear,eabout,emerge,follow,chance,happen,occur,transpire,turnout,workout)(5)Itisv-edthat…=sb/sthistodo(verb=say,report,think,believe,hope,expect,agree,accept,decide,determine,intend,plan,understand,know)四、It作形式宾语用来替代作宾语的从句、动词不定式、动名词,而把真正作宾语的从句、动词不定式、动名