1. Yesterday the sun shines less brightly than today.
2. That cake is less freshly made than this one.
3. Jim's younger brother behaves less politely than he.
4. Teenagers act less violently in the past than these days.
5. I speak less quickly than my sister.
7. She used to drive less carefully than now
8. Last summer I go to the beach less often than this summer..

Bài 10:

1. Yesterday the sun shone less brightly than today

2. That cake is less freshly made than this one

3. Jim's younger brother behaves less politely than him

4. Teenagers act less violently in the past than these days

5. The doctor should treat his patients more patiently than he does

6. I speak less quickly than my sister

7. Mary used to drive less carefully than now

8. Last summer I went to the beach less often than this summer

Bài 11:

1.softer

2.more beautifully

3.more comfortable

4.larger

5.more costly

6.more cleverly

7.more angrily

8.harder

9.warmer

10.richer

Bài 12:

1.comfortably -> comfortable

2. more pretty -> prettier

3.more hardly -> harder

4. more healthily -> healthier

5. more better -> better

6.more fastly -> faster

7. more better -> better

8. confident -> confidently

9. difficulty -> difficult

10. more well -> better