九大状语从句总复习 （1）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), hardlywhen, no sooner.than; 等引导。例如：The cyclist started just as the lights changed to green.Whenever we met with difficulties , they cam to help us.He didnt leave his office until he had finished the days 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
