如题所述
你好,很高兴为你解答
有be动词,句型转换咐,直接用。如:He is a teacher。否:He isn't a teacherteacher .
疑问:
Is he a teteacher?
Yes, he is .
No, he isn't.
没有be动词就借用do 或does.
希望对你有帮助