摘要: 改变谓语结构 在系动词be, become, feel, smell等.助动词be, have, do 等以及情态动词can, may, should等后加not.如果句子的谓语中不是以上这些词.而是行为动词.则相应地将动词的原形.第三人称单数或过去式变为否定形式.如: He has seen the film before. →He hasn’t seen the film before. He will write the book in two months. →He won’t write the book in two months. He does his homework in the evening. →He doesn’t do his homework in the evening.

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