1. Your homework is better than mine.
2. Nga doesn't do the test as easily as him.
3. An English book is cheaper than a dictionary.
4. He used to behave better than he does now.
5. My father is thinner than my uncle.
6. Viet Nam is smaller than the USA.
7. I cook worse than my friend does.
8. HCM City to Ha Noi is farther than Hue to Ha Noi.
9. If we had had a map, we wouldn't have got lost.
10. If he hadn't been late every day, he wouldn't have lost his job.
11. If Peter didn't eat so many chips, he wouldn't be fat.
12. If Robert hadn't started smoking cigarettes, he wouldn't have got a bad cough.
13. Unless you study harder, you will get bad marks.
14. If he had hurried, he wouldn't have missed the train.
15. If my brother had left the car keys, I could have picked him up at the station.