i think______(一定是）Jack that parked the car like that,for he is always doing so.

分类: 作业答案 • 2021-11-12 23:03:06

问题描述：

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

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