=> 1. have been learning 2. didn't work/were 3. want to pass/am going to study 4. sent 5. was/think/learned 6. went/had not enjoyed 7. was doing/met 8. noticed 9. have/had 10. am revising 11. have already begun
12. think/will do 13. is/is not 14. pass/will start 15. will go 16. can see/have become
