Поставьте глаголы, стоящие в скобках, в Past Simple или Past Perfect. Пожалуйста.
1. I (to know) that he (not to learn) the poem.
2. When they (to leave) the beach, the rain already (to start).
3. Arthur (not to know) that we already (to arrive).
4. When I (to come), I (to see) that mother (to cook) dinner.
5. My friend (to study) English before he (to enter) the institute.
6. The car (to go) when I (to look) into the street.
7. He (to take) the decision before I (to come).
8. Nick (return) from office by seven o'clock.
9. We (to get) to the stadium at four o'clock but the game already (to start).
10. She (to come) at six o'clock.
11. I (to think) that my parents already (to return).
12. He (to be sure) that we (not to recognize) him.
13. You (to find) your key which you (to lose) before?
14. Meg (to say) that she (to be) in this city. 1
15. The doctor (to arrive) when we already (to help) him.

1knew.hadn't learnt2left.had already begun3didn't know.had already arrived4came.saw.had cooked5had studied.entered6was going.looked(здесь Past Continuous,а не Past Perfect)7had taken.came8had returned9got.had already started10came11thought.had already returned12was sure.didn't recognize13did you find...had lost14said.had been15arrived.had already helped