I was doing my homework_____ the light went out.

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/22 05:26:46

I was doing my homework_____ the light went out.
A .when B.as C.while D.since

选A.
1.when,as,while都可以表示当……的时候,引导的是时间状语从句.但since的意思是自从,它所引导的时间状语从句通常用于完成时.
2.when可以和延续性动词连用,也可以和短暂性动词连用；而while和as只能和延续性动词连用.
3.when从句的谓语动词可以在主句谓语动作之前、之后或同时发生；while和as从句的谓语动作必须是和主句谓语动作同时发生.
此题的中文意思时,当我在做作业的时候,灯熄了!
可见,“熄”是一个短暂性动词,根据第2点,由此直接可以判断答案是A.
此题中不用考虑第3题即可做出!如果一定要说明,那么是同时发生!

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