高三二轮语法复习状语从句 • 定义: 在复合句中由从句表示的状语称作状语从句,它可以用来修饰谓语(包括非谓语动词)、定语或状语,或是整个句子。 状语从句一般分为九大类 时间状语从句地点状语从句原因状语从句目的状语从句结果状语从句条件状语从句方式状语从句比较状语从句让步状语从句 • 一:对 when, while, as, since 等词的辨析 1.while (1) 表时间段,主从句动作或时态同时发生 , 从句 动词用延续性动词。作“一边……一边……’’时 =as eg. As/While she was cooking, she was singing songs. ( 2 ) while 还可以引导让步壮语从句,条件状语从句。也可以用作并列连词连接简单句。 While he was respected,he was not liked. __________________________ There will be life while there is water and air. __________________________ He is a worker while I’m a doctor. __________________________ 尽管他被尊重,但他却不被喜欢。只要有水和空气的地方就有生命他是个工人而我是个医生。 2. when 表示主从句动作同时或先后发生。作并 列连词译为“这时…… ; 就在那时” , 主要用于下列句型中。 (1)be doing…when (2)be about to do …when (3)had just done…when eg.(1) When she came in, I was eating.(2) I was walking in the street when someone called me. • 3.since 常用在“ It is+ 一段时间 +since 从句”句型中• Eg. It is three years since the war broke out. 自从战争爆发已经三年了。 It is three years since I began to smoke. 我吸烟已有三年了。 二 .as,since,because,for 引导的原因状语从句as ( 由于 ) 表示十分明显的原因,常放在主句前。since (既然)表示对方已知的、无需加以说明的、 既成事实的理由,引导的从句常放于句首。because (因为)表示原因的语气最强,常用于回答 why 引导的疑问句,引导的从句常放于主句后。for 表推理或解释,或用作附加说明,一般不放在句首。 • __________he’s too busy,he can’t do it now.• ______he can’t answer the question, you may ask someone else.• _____he is not well, I decided to go without him.• He took a taxi home, ____it was raining he...