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I had just stepped out of the bathroom and was busily drying myself with a towel
I had just stepped out of the bathroom and was busily drying myself with a towel
游客
2024-01-18
42
管理
问题
I had just stepped out of the bathroom and was busily drying myself with a towel ______I heard the steps.
选项
A、while
B、when
C、since
D、after
答案
B
解析
when既可表示某一点时间,也可以表示某一段时间。在when引导的时间状语从句中,其谓语动词既可以是延续性的,也可以是非延续性的,可与主句中的谓语动词同时发生,也可在其后发生。这个句子中的谓语动词heard是不延续动词,所以要用when引导时间状语从句,表示“这时”。while只能表示某一段时间,不能表示某一点时间。在while引导的时间状语从句中,其谓语动词只能是延续性的,而且也只能与主句中的谓语动词同时发生或存在。since引导时间状语从句,表示“自从……”,其主句常用现在完成时。after引导时间状语从句,表示“在……之后”,其从句常用过去完成时。
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