1. Is Nick at home? No, he has not come yet. He is still playing football.
2. When did you come to Moscow? A week ago.
3. Have you done the translation yet? You only began an hour ago.
4. I'll tell him about this if I see him.
5. My sister will come tomorrow.(is coming если действие запланировано, то нужно использовать этот вариант)
6. He knew that Peter had been in Kiev in 1980.
7. He said that they would be back in Minsk next week.
8. What are they discussing now?
9. Do you often speak English in class?
10. My mother has bought me a nice present for my birthday.