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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? (责任编辑：admin) |
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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? (责任编辑：admin) |