исправьте ошибку пожалуйста​

q1. than ( no "of")

2. harder (no "difficultier"

3. most boring (no "boringest")

4. worse*

5. happiest*

6. Tom is taller than his father

7. my sister is quieter than me.

8. this is the best book i've ever read

9. my brother is two years older than me

10. martin is less careful than john.