你要先看when引导的是什么从句,是宾语从句还是时间状语从句 如果是宾语从句,那么时态问题就参考宾语从句的做法 如果是时间状语从句,则基本有4种 1.表示有规律的,都用一般现在时 如:Water turns into steam when we heat it. 2.表示将来的事情,用主将从现(主句将来时,从句一般现在时) 如:I will tell him when he comes back. 3.表示过去两个有先后的动作,都用过去式 如:When he came back, I told him the news. 4.表示一个动作正在进行(过去进行时),另一个动作插入(过去式) 如:I met my teacher when i was walking in the street.
when while as soon as 出现在句子中什么情况是后面接什么时态。。。求解
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