he did his homework at yesterday改否定句

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问题描述:

he did his homework at yesterday改否定句求高手给解答

最佳答案

推荐答案

首先,这是个病句,yesterday 是惯用语,直接做时间状语,不加任何介词,所以须去掉at。

这个问题得先把病句纠正成正确的陈述句再改写成否定句。He did his homework yesterday.改成否定句:He didn't do his homework yesterday,或者He did not do his homework yesterday.

其他答案

He didn't do his homework yesterday.英语句改为否定句,第一步要找谓语动词,当谓语为实意动词时要借助助动词实现否定,这里是过去式,所以助动词用didn't,助动词后面接动词原形,原来的did改为原形do,这里的do不是助动词,而是实意动词 。

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