内容正文:
高考英语九大状语从句总复习
状语从句在主从复合句中修饰主句中的动词、形容词或副词等,按意义可以分为时间、地点、原因、目的、结果、条件、方式、比较、让步等状语从句。
一.时间状语从句。
通常由从属连词when, whenever, as, while, before, after, as soon as, till, until, since, once (一旦), hardly……when…, no sooner…….than…; 等引导。例如:
The cyclist started just as the lights changed to green.
Whenever we met with difficulties, they came to help us.
He didn’t leave his office until he had finished the day’s work.
应注意的问题
1.在时间状语从句中,通常要用动词的一般现在时态表示一般将来时态,用一般过去时态表示过去将来时态。但when 引导一般疑问句或名词性从句时不受上述语法规则的限制,因此,应该加以区分。例如:
When China will enter WTO depends on the bilateral (双边的)joint efforts.
Once you understand the rules of the game, you’ll enjoy it.
2.when , while, as 的不同用法。一般说来,当主、从句的动作是同时发生的事,三者可以换用。when 既可以引导一个持续动作,也可以引导一个短暂动作,可用于主句和从句动作同时发生或从句动作先于主句动作;while 引导的动作必须是持续性的,强调主句和从句的动作同时发生,往往侧重主句和从句动作的对比;as 用于引导“在某行为的继续中发生某事”的“继续之行为”,所以多与过去进行时连用,翻译成“一边……一边……”或者表示动作的变化,翻译成“随着……”。
例如:
I hope you’ll think of my words as/when/while you drive on the busy roads.
When he realized it, the chance had been lost.
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