while从句的谓语必须是延续的,不能是非延续性动词。
She sang as we walked.I listened carefully while she was singing,and we felt happy when we got home.
我们一边走她一边唱,她唱的时候我认真听。到家的时候我们感觉很高兴。
2.until 和not...until
until 要与延续性动词连用; not...until 要与非延续性动词连用。
He didn't go to bed until his father came back.
3.特殊的时间状语从句的引导词
1)the moment,the minute, the instant,the second;no sooner...than...;hardly/scarcely...when...等以及表示瞬间的directly,immediately,表示“一……就……”,相当于as soon as。no sooner...than...,hardly/scarcely...when...结构中no sooner和hardly/scarcely引导的句子中谓语动词通常用过去完成时,而than和when引导的句子中谓语动词通常要用一般过去时,此外,no sooner和hardly/scarcely位于句首时,句子应用部分倒装语序。
Tell him the news the minute you meet Tom.
Hardly had I got home when it began to rain.
2)next time,the first time,last time,every time,the spring(summer,autumn,winter)等,这类短语名词直接用作连词引导时间状语从句。
Every time I see him he wears a pleasant smile.
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