主语从句与主语从句it.ppt

The Subject Clause;Make sentences ; 主语从句（Noun Clauses as the Subject）;连接词：;2)连接代词who ，what ，which, whatever, whichever, whoever ;主语从句可以前置，也可以后置。用it做形式主语，而把主语从句，在句末，常用下面几种句型。;2. It+不及物动词+主语从句 It seemed (happened, doesn’t matter, has turned out) that… ; 3. It +及物动词（被动语态）+主语从句;4 . 用于It is important / natural / necessary / impossible that...句型中, 主语从句应使用虚拟语气, 谓语动词用\“should + 动词原形\”的形式, should有时可以省略。; (1)主语从句中用陈述语序 What she is afraid of is their taking her to Paris. ( What is she afraid of … Wrong ) (2)主语从句后谓语动词用第三人称单数 That they haven’t phoned is strange. (3)that引导的主语从句中，that不可被省略 That price will go up is certain. ;It 作形式主语和it引导强调句的比较;what 引导主语从句时在句时在从句中充当句???成分，如主语．宾语．表语，而that 则不然。例如： 1) What you said yesterday is right. 2) That she is still alive is a consolation. ;Describe your mother with your partner.