状语从句课件1.ppt

Adverbial Clause 状语从句 状语从句的定义、功能、分类定义:在复合句中作状语的从句功能:状语从句在主从复合句中修饰主句中的动词,形容词或副词,或整个主句分类:按意义可分为时间、地点、原因、目的、结果、条件、方式、比较、让步等状语从句。从句的位置放在句首,也可放在句末。放在句首时,从句后面常用一个逗号,放在句末时, 从句前一般不用逗号。状语从句 1. 时间状语从句 2. 地点状语从句 3. 原因状语从句 4. 条件状语从句 5. 让步状语从句 6. 目的状语从句 7. 结果状语从句 8. 方式状语从句 9. when,while,as,since,before,after, until,till, once,as soon as,every time, hardly …when …, no sooner … than …Ⅰ连接词 when 的用法小结 1. when 可用来引导时间状语从句,意为“当……的时候”从句的谓语动词可以是延续的,也可以是短暂的。如: . ① When the film ended, they went back. ② When I lived there, I used to go to the shop on Sundays. 2. When 常用于下列句式: 意为“就在那时”。如: be about to do … when be on the point of doing sth... when … 3. when 可以表“既然”,如: can I help them to understand when they won ’ t listen to me? 1. while 可用来引导时间状语,意为“当……的时候”;引导的动作必须是持续性的,如: Please don ’ t talk so loud while others are working. 2. while 作为并列连词,意为“而,却”,表示对比。 Jane was dressed in brown while Mary was dressed in blue . 3. while 也可用来引导让步状语,意为“尽管,虽然”;可表示尽管, 相当于 although 。 While I admit that the problems are difficult , I don ’ t agree that they can ’ t be solved. 4. 趁…的情况赶紧做, 否则来不及了。 Strike while the iron is hot. 趁热打铁 1. while 可用来引导时间状语,意为“当……的时候”;引导的动作必须是持续性的,如: Please don ’ t talk so loud while others are working. 2. while 作为并列连词,意为“而,却”,表示对比。 Jane was dressed in brown while Mary was dressed in blue . 3. while 也可用来引导让步状语,意为“尽管,虽然”;可表示尽管, 相当于 although 。 While I admit that the problems are difficult , I don ’ t agree that they can ’ t be solved. 4. 趁…的情况赶紧做, 否则来不及了。 Strike while the iron is hot. 趁热打铁连接词 while 的用法小结连接词 when, while, as 的用法区别: when, while, as 都可表示“当……的时候”,使用时应注意: 1) when 可表示一个时间点,也可表示一个时间段。如: When he came in, we were having supper. When we were having supper, the light suddenly went out. 2) while 则只表示一个时间段。它所引导的时间状语从句中的时态常用进行时态。如: When / While he was eating his breakfast, he heard the doorbell ring. While he was watching TV, the boy fell asleep. 3) as 则强调主句和从句的动作在同一时间进行;也可表示“随着…”。 She sang as she walked along. As th