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the boys play football yeterday because they had much homework to do.B.couldn't C.can't为什么C不对?

题目详情
the boys play football yeterday because they had much homework to do.B.couldn't C.can't
为什么C不对?
▼优质解答
答案和解析
因为C是一般现在时啊,句子说的是昨天的事情,应该用一般过去时啊.
请及时采纳,多谢!