初中英语状语从句课件(共20张PPT)

状语从句 Adverbial Clause LOREM IPSUM DOLOR I will call you tomorrow. 用来对谓语动词进行补充、说明和完善的成分，我们称之为 状语。 I will call you when he comes. 当状语部分是由简单句构成的时候，我们称这样的句子为状语从句。 从句 主句 主句+连接词+从句 I will call you when he comes. 状语从句有很多种， 其中对动作发生的时间进行描述的从句， 我们称之为 时间状语从句。 when, while, before, after, until, since, as soon as...... 时间状语从句主从句之间的连接词 注意：从句动作既可以发生在时间点，也可以发生在时间段。 when 瞬间动词 延续性动词 1.The students were playing computer games when the teacher came in. 2.When I was walking along,I came across a friend of mine. 瞬间动作 延续动作 时态 3.We will go out for a walk when the weather is fine。 4.I always drink coffee when I work. 5.When he gave me a present, I thanked him. 时态 主将从现 （祈使句，情态动词也可视为主将） 主现从现 主过从过 注意：while引导的时间状语从句，主句动作是在从句动作进行的过程中发生的。 Someone knocked the door while we were having supper. while 从句必须是延续性动词 1. Someone knocked the door while we were having supper. 2. I was watching TV while my mother was cooking。 时态 when 强调两个动作同时发生，主从句