反意疑问句 aren't you? are you?

You are a teacher,aren''t you？和You aren''t a teacher,are you？一样吗？回答的YES，NO的含义一样吗？

You are a teacher,aren''t you？
Yes, I am. “对，我是。”
No, I''m not. “不，我不是。”

You aren''t a teacher,are you？
Yes, I am. “不，我是。”
No, I''m not. “对，我不是。”