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8. Unless you hurry up, you won't catch the first bus.
If
9. He didn't clean the room four months ago.
- The last time ..
10. We haven't worn this kind of clothing since we graduated from university.
- The last time
11. They haven't visited Nha Trang since they were thirty.
- The last time
12. John doesn't study as well as heused to.
→ John used .
13. My brother doesn't sport as well as he used to.
→My brother used..
14. My sister was not a good student when she was younger.
→When ..
15. Liz didn't play the guitar well when she was 15 years old.
→When