问题描述:
有be动词的英语句型变过去式是变be动词还是变be动词后面的动词(变为过去式)?请说明理由
例如:
I am doing my homewok.(原句)
变过去式是I were doing my homework 还是I am did my homework
什么时候变be动词,什么时候变动词?
例如:
I am doing my homewok.(原句)
变过去式是I were doing my homework 还是I am did my homework
什么时候变be动词,什么时候变动词?
问题解答:
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