表示将来动作或事情的时间状语从句中，动词要用现在时态代替将来时,基本上掌握"主将从现"就可以了,不行的话就一起到退一个时态.下面就是一个例子. 用于hardly/scarcely...when; no sooner ...than 句型中，主句用过去完成时，从句用一般过去时。 I had hardly finished my work when he came to see me. I had no sooner got into the room than it began to snow. No sooner had I arrived home than the telephone rang. （注意主谓倒装）
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