Have you done your homework yet?Yes I finished it a momeng ago后面回答的句子中,finish为什么要用一般过去时而不用现在完成时?

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Haveyoudoneyourhomeworkyet?YesIfinisheditamomengago后面回答的句子中,finish为什么要用一般过去时而不用现在完成时?Haveyoudoneyour

Have you done your homework yet?Yes I finished it a momeng ago后面回答的句子中,finish为什么要用一般过去时而不用现在完成时?
Have you done your homework yet?Yes I finished it a momeng ago
后面回答的句子中,finish为什么要用一般过去时而不用现在完成时?

Have you done your homework yet?Yes I finished it a momeng ago后面回答的句子中,finish为什么要用一般过去时而不用现在完成时?
a moment ago 表示我刚做完,姑用完成时.用Yes,I've already finished it.也可
不懂可再问哦!

ago 是一般过去时的标志

a moment ago 是过去的时态,像last year, just now等;而像since.....,yet,already等是现在完成时