1. You must give up smoking
2. A party was awesome. You should have come.
3. You can solve this problem
4. I had to do that
5. I don't know why we were in a hurry. We shouldn't (needn't/mustn't) have rushed.
6. I would like to go with you
7. You can do everything you want
8. Olga must(has to) pay more attention to English language lessons
9. I am not sure, but he can be wrong
10. I can count till 50 in Spanish