高三英语一轮复习表语从句的归纳与讲解

表语从句 当句子的表语由从句来充当时，这个从句就叫做表语从句。 表语从句一般都是位于系动词之后的。 表语从句的连接词 常用来引导表语从句的连接词主要有： that whether what/who/whom/whose/which when/where/why/how及其短语 （一）that 当that引导表语从句时，只起连接作用，不在表语从句中充当任何句子成分。如： His advice is that we should leave for Shanghai before dawn. Her plan is that she will call the police first and then try to stop the thief from running away. 【注意】 当名词主语是表示建议、命令、要求等含义（如advice、order、idea、notion、proposal、suggestion、request等）时，其表语从句中的谓语动词一般要采用“should+do”的形式，should可以省略。如： The officer's order was that all the soldiers (should) never surrender to the enemy. （二）whether 当表语从句要表达“是否”的含义时，连接词要用whether。如： His question is whether they can arrive in London on time. 需要注意的是，尽管if也可以表示“是否”的含义，但在表语从句中只能用whether，不能用if。 （三）what/who/whom/whose/which 这些疑问代词如果用来连接表语从句，既起着连接作用，同时又在从句中充当句子成分，可以作主语、宾语、定语等。如： My concern is what he really expects to get from us. Her question is who has broken the glass. Our dilemma is which side we should take. Their worry is whom she can rely on. His puzzle is whose money it belo