2)Aren't
3)I don't know
4)Aren't
5)Isn't
6)isn't
1) -
2) He has tried.
3) I have bought.
4) I haven't brought
5) It has been snowing.
6) How long have they been cleaning the house?
7) I have known.
8) Здесь, возможно, Are you crying?
Возможно, я не так что-то поняла, но дано только 4 утверждения и только 4 времени, значит, как я думаю, должно быть так:
What does she do?
What is she doing?
What has she done?
What has she been doing?
Ответ:
Tom tired-present simple
Tom is being tired (если не ошибаюсь)