肯定 用yes,
否定用no 如
He is a student ,isn't he 他是学生,对吗?
Yes,he is .是的,他是.
No ,he isn't .不,他不是
区别前否后肯的翻译：
He isn't a student,is he 他不是学生,对吗?
Yes,he is .不,他是.
No,he isn't .是的,他不是