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Couldyouplsgotomovieswithme?Sorry,Ican't.回答的时候为什么是can't而不能是couldn'tSorry,Icouldn't.和Sorry,Ican't但是参考答案选择Sorry,Ican't

题目详情
Could you pls go to movies with me?Sorry ,I can't .回答的时候为什么是can't而不能是couldn't
Sorry,I couldn't.和Sorry,I can't但是参考答案选择Sorry,I can't
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答案和解析
提问用could是表示比较委婉的请求;回答用can't是不能的意思,此处是现在时,而couldn't是can't的过去式.