I can't remember if he____(hand)in his homework in time

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I can't remember if he____(hand)in his homework in time

I can't remember if he____(hand)in his homework in time
I can't remember if he____(hand)in his homework in time

I can't remember if he____(hand)in his homework in time
handed.if引导的宾语从句,我不记得他是否按时交了作业.交的动作应该在过去.

handed
解释:if 表示“是否”,句意是:我不记得他是否按时交的作业。根据句意,用一般过去时。
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