1- the speaker is (almost) sure about what he says and doesn'r expect an answer?
2-the speaker isn't sure and expect an answer?
1 - She isn't here, is she? 2 - They're late, aren't they?
3 - He arrived yesterday, didn't he? 4 - She is sleeping, isn't she? 5 - We can't
go, can we? 6 - She hasn't left, has she?