три предложения с "doesn't he?", "aren't you?" и "hadn't you?" (не так ли?). ​

Doesn't he supposed to be at the party right now?

Aren't you joining them with group project?

Hadn't you prepared for all your exams

или же можно так:

He supposed to be at the party right now, doesn't he?

you are joining them with group project, aren't you?

you had prepared for all your exams, hadn't you?