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He must be playing computer games at home,isn't he,为何用isn't he?

分类: 作业答案 • 2021-12-31 11:11:50

问题描述：

答

别因为看到must而用了mustn't(禁止）
因为这句的主干是“He is playing ."
而must只是表示肯定的判断,不影响主句意思.
所以用isn't he.
例：
You must know the truth,don't you?

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I go to school at a quarter past seven (咋样保持愿意)
耳朵的结构从外到内依次是()、()、()、()

He must be playing computer games at home,isn't he,为何用isn't he?

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