2024年中考英语语法：时间、条件、原因状语从句精讲&精练

中考语法：时间、条件、原因状语从句精讲&精练 一. 时间状语从句 主要连词：when、while、as、as soon as（一......就......）、before、after、since等。 【注意1】时间状语从句要符合“主将从现”的原则：即主句用一般将来时，从句用一般现在时。例如： I will call you as soon as I arrive in Beijing. 我一到北京就给你打电话。 I will give you a call when I arrive at London. 我到伦敦后会给你打电话。 【注意2】since 的用法：since引导的时间状语从句必须是一般过去时，其主句必须时现在完成时。例如： Since I came to Beijing, I have lived here. 自从我来到北京，我一直住在这里。 【注意3】while 引导的时间状语从句中，谓语动词必须时持续的; when 引导的时间状语从句中，谓语动词可以持续也可以不持续。例如： While I was away last summer, my dog was taken good care of. 我去年夏天离开的那段日子里，我的狗被照顾的很好。 When I lived in that small village，I often went to play in the field. 当我住在那个小山村的时候，我经常去地里玩耍。 When the film ended，all the people began to go out of the cinema. 电影结束后，所有的人都开始走出电影院。 时间状语从句的连词（引导词） 1、常用引导词：when, as, while, as soon as, before, after, since, not...until，until/till等。 a, when引导时间状语从句时表示当……的时候， when既可以指时间段也可指时间点，从句中既可用延续性动词又可用非延续性动词，且动作既可和主句的动作同时发生，又可以在主句的动作之前或之后发生， 如： I'll call you when I get there. My wife was cooking dinner when I came home. When the wind blows, all the doors rattle. He stopped trying when he would have succeeded next time. 注意1：如果when引导的时间状语从句的主语与主句主语相同， 而从句的谓语又是be动词时， 那么从句中的主语和be可以省略。如： When you are in trouble, ask her for help. When in trouble, ask her for help. 注意2：当when引导的时间状语从句的主语与主句主语相同时， 往往还可以用“when＋分词”的形式替代该状语从句。如： When I came into the room, I found him lying there asleep. When coming into the room, I found him lying there asleep. 英语从句【教材】 Jerry的知识小店(已迁移) 58购买 b, while引导时间状语从句时，表示当……的时候， 它强调主句的动作与从句的动作同时持续地进行，(往往侧重主句和从句动作的对比)， 用这一用法时while引导的时间状语从句和主句中的谓语动词必须是延续性动词。如： We must strike while the iron is hot. While my wife was reading the newspaper, I was watching TV. c, as引导时间状语从句时表示“当……时， 一边……一边……”， 侧重表示两个动作同时发生(包括一个主语同时进行两个动作)， 或者一种动作随着另一种动作的变化而变化。As引导的动作是延续性动作。如： I slipped on the ice as I ran home. He played with his mobile phone as he went along. 注意3：当when, as, while表示“在某段时间里”，主从句的动作同时发生时可以互换。如： When we were discussing, Mr. Simon came in. While we were discussing, Mr. Simon came in. As we were discus