He is a mechanic 变疑问句和否定句
问题描述:
He is a mechanic 变疑问句和否定句
答
Is he a mechanic
He is not a mechanic
答
Is he a mechanic ?
he is not a mechanic .
答
Is he a mechanic?
He isn't a mechanic
答
is he a mechanic ?
No,he isn't.