Спасите, упрашиваю!!!! Очень срочно!!!!!!

1. I bought it yesterday.
2. You look tired. Have you been working all day?
3. I think I will work at my mum's shop next week.
4. I didnt remember to pay bills last month.
5. He visiys his son every Sunday.
6. We were standing by the door while the children were walking.
7. They will go on holidays next month.
8. They were listening to music while we were doing our homework.
9. He has been living there since he was a child.
10. Will you come to the party if you have time?
11. If people invent new fuel, cars won't pollute the air.