Unit 2 B Grammar and activity 课件-2021-2022学年高中英语上教版（2020）选择性必修第三册

The stuff in our lives Q: If you have too much things in your room and they have prevented you from enjoying the normal life, what do you have to do? A: what I have to do is . what I have to do is to throw them away . or What I have to do is throwing them away. 定义： 在复合句中起主语作用的从句叫主语从句。 主语从句subject clauses 引导主语从句的关联词有从属连词that、whether，关系代词：who, what, which , whom, whose, whatever, whoever, whomever, whichever；关系副词：when, where, how, why, however, whenever, wherever,等。 That they will go is certain.他们去是肯定的。 Whether she's coming or not doesn't matter too much. 1、从属连词 that，whether引导的主语从句 从属连词that，whether在主语从句中的作用只是引导主语从句，它们在从句中不担任成分，不能省略。 It is a pity that you didn’t go to see the film. That you didn’t go to see the film is a pity . 如果主语从句太长，为避免句子结构头重脚轻，我们可用it作形式主语，而把主语从句放在主句谓语部分之后。That引导的主语从句可用it代替，that 不可省略 It作形式主语，that引导真正的主语从句，放在句尾。 2、 it作形式主语引导主语从句 用作it作形式主语的结构： 1.