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

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

人气：422 ℃　时间：2020-04-02 18:50:45

解答

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?