中考英语状语从句用法讲解教案

中考英语状语从句用法讲解教案 （一）状语从句概述 定义 状语从句用作状语，是起副词作用的句子。 位置 状语从句可以放在主句之前，也可以放在主句之后，时间、条件、原因和让步状语从句放在句首时需要用逗号和主句隔开。 分类 根据其作用可以分为时间、地点、原因、条件、目的、让步、方式和比较等状语从句。 作用 它可以修饰谓语、非谓语动词、定语、状语和整个句子。 （二）状语从句详解 1. 时间状语从句 引导词 用法 示例 when 意为“当…的时候”。When引导从句的谓语动词可以是延续性动词，也可以是瞬间动词。并且when有时表示“就在那时” A liar is not believed when he speaks the truth.说谎者讲真话时也没有人相信。 When he arrives, I’ll call you. When you laugh and smile, your body relaxes. while 意为“在…的时候，在…的同时”。While引导从句的谓语动词必须是延续性的，发生时间较长，并强调主句和从句的动作同时发生（或者相对应）。While有时还可以表示对比。 While I was standing at the window, I saw several boys running along the street. While John was watching TV, his wife was cooking. as 意为“一边…一边…”。As引导的动作是延续性的，发生时间较短，一般用于主句和从句动作同时发生；as也可以强调一前一后。 The writer was angry as he was travelling on a train to London because someone had invaded his “space”. He smiled as he stood up. after 意为“在…之后”。表示主句动作发生在从句动作之后。主句与从句的动作时间关系与before引导的从句相反。 With many hungry visitors waiting, don’t stay too long at your table after you have finished. If an early exit