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最佳答案:不,英语提问用过去式,那么回答时时态与之相附.例如:what did you do yesterday?答:i went shopping yesterday.
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最佳答案:once there was,由于是过去,所以要用was,而不是is
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最佳答案:否定 I can't swim一般疑问:Can you swim?肯定回答:Yes,I can.否定回答:No,I can't.can的过去式是could