> 英语 >
i think______(一定是)Jack that parked the car like that,for he is always doing so.
为什么标答是it must have been
人气:388 ℃ 时间:2019-08-18 04:13:16
解答
it 是形式主语,代后面的从句,原来形式是it must be,用了完成时为什么要用完成时后面是parked
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