那do you know 和did you know 呢
与疑问词无关
主句是一般现在时,从句根据句子意思可用不同时态,主句是一般过去时,从句要用相应的过去时态,除客观规律和客观真理外
如
He asked what you were doing.
Do you know where he is from?
那do you know 和did you know 呢
哦
追答do you know 作主句时,是一般现在时,从句可用不同的时态。
did you know 是一般过去时,从句要用相应的过去时。
如:
Did you know where he came from ?
那could 呢
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