had用于什么时态

分类: 作业答案 • 2022-04-30 21:09:13

问题描述：

had用于什么时态

答

可以用于过去时,此时是动词,如I had my dinner at 8.p.m. alone in the cafeteria.再就是作为非谓语,可以是过去完成时had done,如Ihad lost my book. 过去完成进行时had beendoing如I had been playing ...

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had用于什么时态

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