IV.
1. she ought to clean it every day.
2. I ought to practice tennis more regularly.
3. he ought not to smoke so much.
4. he ought to go to bed early.
5. he ought not to drive so fast.
6. I ought to stay in bed.
7. she ought not to stay up late.
8. he ought to buy a new one.
V.
1. should
2. can
3. must
4. ought
5. must
6. can
7. should
8. ought
