来源:网络资源 2023-01-12 10:57:26
肯定形式:
主语+动词过去式+其他
例句:She often came to help us in those days.
否定形式:
①was/were+not;②在行为动词前加didn't,同时还原行为动词
例句:I didn't know you are so busy.
一般疑问句:
①Did+主语+do+其他? ②Was\Were+主语+ do sth?
例句:Did I do that?
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