3. Put the verbs in brackets into the Present Perfect or Present Perfect Continuous:
1. Why don't you stay at the institute and finish your homework? - I (have already
finished) it.
2. He's bored. He (has been reading) a dull book for three hours.
3. Cadet Ivanov (has gone) to the canteen. He'll come soon.
4. My Dad is happy. He (has been driving) his new car for three hours.
5. Have you (ever been) to the Drama Theatre?
6. We're worried. We (have been waiting) for the examination results for an hour.
7. The freshmen (has already swept) the drill ground. They (have been doing) it for two hours, they're tired.
8. It (has been snowing) a lot this morning. We should clean the drill ground.
9. Why don't you stay at home and finish your housework? - I (have already finished) it.
10. Why are you so dirty? - We (have been cleaning) room 414 for three hours.
It меняем на They.
is меняем на are т.к.are используется во мн.ч
A убирается. А к сущ.и прил.добавляем s.
They are blacks dogs. They are frogs.