时间状语从句:常由when和while引导。例如:When I was young, I preferred to stay at home rather than going out. 条件状语从句:常由if和unless引导。例如:If you want to succeed, yo...
1)when, while, before, after, as soon as, until, since等,引导时间状语从句。 2)because, as, since等引导原因状语从句。 3)if, as long as等引导条件状语从句。 4)though, although...
一是,在时间状语或条件状语从句中,如果主句的谓语动词是一般将来时,那么从句的谓语动词需要用一般现在时代替一般将来时,也就是所谓的“主将从现”。同时,“主情从现”“主祈从现”也是...
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