1. has had (trạng từ for→HTHT)
2. works
3. employ: thuê
4. bought ( Qkd)
5. is managing (trạng từ now→HTTD)
6. came (Ago → QKĐ)
7. have been (Since + qkd, htht)
8. don't teach
9. collect
10. have worked (trạng từ for→HTHT)
11. got
12. have enjoyed (HTHT since QKD)