Ответ:
2. Have you seen it
3. I've forgot
4. Hasn't replied
5. Hasn't finished
6. Has the weather changed
7. You haven't signed
8. Have gone
9. He hasn't decided yet.
10. I just seen her.
11. Has he already gone?
12. Has your course stared yet?
1) discussing
2) went
3) reading
4) done
Перевод сама)
Это сокращенно от " I will" Сокращенно можно писать I'll. переводится "я буду"
1 are developed
2 is known
3 were being cleaned
4 were done
5 were done
5 will be translated
6 it is still being made
7 had been painted
8 are made
9 will be discussed
10 was being played