Module 2 时间状语从句课件（14张）

如果我们用一个从句来表达一件事情或一个行为发生的时间，那么这个从句就叫时间状语从句。 While we're staying with our friends，we're going to spend one day in Qingdao. And my family always go somewhere interesting as soon as the holiday begins. when/while/as 当。。。的时候 after 在。。。之后 before 在。。。之前 until/till 直到 as soon as 一。。。就。。。 since 自从 1.while的用法： （1）while引导的从句的谓语动词必须是延续性的。While he was waiting for a bus, it began to rain. （2）强调主句和从句的动作同时发生（或者相对应）My mother was watching TV while my father was reading newspaper. （3）while有时还可以表示对比。I like basketball while my brother likes football. 区别：由when和while引导的时间状语从句 2.when的用法 when 引导的从句的谓语动词可以是延续性的，也可以是非延续性的。 √ √ √ before 意为“在……之前” after 意为“在……之后” 区别：由after和before引导的时间状语从句 1.Laura went to school by bike ________she had breakfast at home. A．when　B．after C．before D．while 2.Please take the medicine _________ you go to bed. A．when　　B．after C．before D．while 3.We should wash our hands _______ we have meals. A. after B. before C. when D.