Negative tags expect a yes answer.
I have met you before, haven't I? (expects a yes answer)
Positive tags expect a no answer.
I haven't met you before, have I? (expects a no answer)
More examples:
The application was refused, wasn't it? Yes, I'm sorry it was.
The guests won't be arriving today, will they? No, they are arriving tomorrow.
It's a beautiful garden, isn't it? Yes, we have worked hard.
You are not working very hard, are you? No, I'm not feeling well today.
The tag question is "doesn't he?"
The question tag for "you were" would be "weren't you?"
She is (positive) beautiful, isn't (negative) she?
She can do it correctly, couldn't she? Is the correct question tag of the statement.
The tag question for "The book was lost" would be "wasn't it?"
ought is a "positive" word, so the question tag should be a "negative" you can replace "ought" with "should" so a possible question tag is shouldn't
The negative tag question for "I am" would be "I am, aren't I?"
This question ''
question taq does not have
i am sorry (add question tag)
The tag question, which is added to the sentence in order to get agreement, would be "don't they?"
Man is mortal, isn't he?