In this question, the OP wrote this:
She must leave early, mustn't she?
But I read this sentence here:
You must go, needn't you?
I read about must have here, but it doesn't say explain a lot about must as present modal. I only found this sentence:
He must use the lift, mustn't he?
Which one is correct here? Also, these are confusing me too:
You must be tired, ____?
That guy must be rich, ____?
You must visit me every day, ____?
You don't seem to be a happy couple. You guys must fight a lot, _____?
According to what I can understand, the word must has several forms of tag questions.
I have googled and read some references, but the explanations seem to be overlapping.