1. i could help you.
2. Could you help me?
3. I could not help you.
4. We could win.
5. Could you win?
6. We could not win.
7. He could become a doctor.
8. Could he become a doctor?
9. He could not have become a doctor.
10. She could go to England.
11. Could she go to England?
12. She couldn't go to England.
13. Last year he could run fast.
14. Could he read well last year?
15. We couldn't speak English well last year.
16. Could you give me a phone number?
17. Yes, I could.
18. Could we visit him? He misses.
19. Yes, we could visit him.
20. Could you come with me to the shop?
I could help you.
2. Could you help me?
3. I could not help you.
4. We could win.
5. Could you win?
6. We could not win.
7. He could become a doctor.
8. Could he become a doctor?
9. He could not have become a doctor.
10. She could go to England.
11. Could she go to England?
12. She couldn't go to England.
13. Last year he could run fast.
14. Could he read well last year?
15. We couldn't speak English well last year.
16. Could you give me a phone number?
17. Yes, I could.
18. Could we visit him? - He misses.
19. Yes, we could visit him.
20. Could you come with me to the store?
P.S. не уверена что правильно но как то так