知识点：一般过去时三咱句型形式
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?
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?
招生简章
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