1. don't -> didn't
2. are walked - walked
3. was understand -> understood
4. knew -> know
5. was -> bỏ
6. died -> die
7. use -> used
8. was - bỏ
9. can -> could
10. is -> bỏ
11. there's -> there are
12. can -> could
13. can't -> couldn't
14. of -> to
15. used -> are used/ get used
16. industry -> industrial
17. language -> languages
18. seperate -> seperated