question tags

Hello!

I don`t know the question tags for the following sentences:

She may have come,.........?
She might have come,........?

Is there anyone who could help me, please?

Thank you very much.

[Tdol]

mayn't she/may she not
mightn't she/might she not

Thank you for your answer but , I still have a question.

In one of the grammar English books I have read lately, it is mentioned that the contrasted forms, mayn`t and mightn`t, are not correct or rather unusual,and we should avoid them. Is this true?

Thank you very much.

[Tdol]

The contracted forms are not used much. To BrE ears, they sound rather dated, especially 'mayn't', but they aren't wrong and they are used in question tags. I wouldn't normally use them in other cases.

He mightn't come.
He might not come.

Here, I would always use the second.