为什么ing形式一般疑问句不能用do
比如She is swimming at the pool改为一般疑问句是Is she swimming at the pool?为什么不是Does she swimming at the pool?想不通,请讲解,谢谢!
人气:483 ℃ 时间:2019-10-25 08:21:55
解答
do/does/did 用在一般现在时与一般过去时
be + ING 用在进行时
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