1. His sister doesn't study as well as my brother.
2. I don't study as well as she.
3. He is older than Richard looks.
4. My brother is fitter than me.
5. He studies better than we do.
6. Your computer is more convenient than mine.
7. I don't play the guitar as well as my friend.
8. Jack studies very hard.
9. Nam studies more hardly than Minh does.
10. Bananas are better for your health than mangoes.
11. I can't swim as well as my friend does.
12. Jane cooks better than Robert does.
13. Jim drive more carelessly than Jack does.
14. The living room isn't as big as the kitchen.
15. Tom speaks English better than Alice.
16. Hieu Minh is more intelligent than Robert.
17. The traffic in the city is busier than the traffic in the country.
The air in the country is fresher than the air in the city.
18. My father can swim better than my younger brother can.
19. His teacher can write more carefully than he can.