Are the question tags correct?

This one, as a sentence, is correct.

I'm not sure what you mean by "question tags".

Question tags

We use tags in spoken English but not in formal written English.

They are not really questions but are a way of asking the other person to make a comment and so keep the conversation open.

Making a tag is very mechanical. To make a tag, use the first auxiliary. If there is no auxiliary, use do, does or did. With a positive sentence, make a negative tag and with a negative sentence, make a positive tag.

•It's beautiful, isn't it?
•He has been, hasn't he?
•You can, can't you?
•It must be, mustn't it?
•You know him, don’t you?
•He finished it, didn't he?
•He will come, won't he?

We would call that a leading question.

No, "we" wouldn't, Izzy. Those are known grammatically as Tag Questions and for some, most? they are used to seek confirmation of what is already known rather than asking a full blown question.

To determine "correct", we need context, Ms Tan. Only the last one seems possible. And I'd say that it's more probable as,

You have to come to school regularly, don't you?

The others contradict or suggest things that aren't normally found in Tag questions. I don't think that I've ever seen a Tag with different verbs as in your first three examples.

Thanks, JTT and McTag.

This is true except for the "I really know" tag questions, Ms Tan.

Imaginary examples:

1. I travel to your country to meet you and upon meeting.

"So you're Tanguatlay, are you?"

Imagine there's a little girl with you and you have previously told me you have a daughter, named Kara.

"And this is Kara, is it?"

or speaking to Kara,

"And you are Kara, are you?"

2. You take me to show me Mt Everest and we come around a cliff face and I see it.

"So that's Mt Everest, is it?"

I was talking from a UK perspective, I wouldn't dream of speaking for an American.

They're called the same thing in the UK, Izzy. You're not up on grammar terminology, are you?

You're mistaken, a leading question is not when you're trying to get confirmation of what is already known, but to get the answer you want.

'You're feeling a lot better now aren't you?' leads the answer 'Yes,' but the person might be very ill. They just want his bed.

It's seems very euphemistic to describe a question designed to get a specific response as merely confirmation of what is already known. Sounds like the sort of thinking an interrogator would engage in. You carried many interrogations JTT? Sorry, knowledge confirmation sessions.

Ms Tan's question deals with the grammar issue, Izzy. There is no grammar designation - "leading question" in the UK, the US, Canada, Australia, New Zealand, ... .

Same answer for both - for once.

You'd need to get your mouth enlarged, and they won't do that on the NHS.

You CAN come to school regularly, can't you?
You SHALL come to school regularly, shan't you?
You SHOULD come to school regularly, shouldn't you?
You must come to school regularly, mustn't you?

SCHOOL IS FUN, ISN'T IT?