11. You won't need to go to the meeting next week.

need + to V: cần làm gì 

12. Sonia isn't interested in roller-skating.

be interested in + Ving / N : thích 

13. You had better ride the bike more carefully next time.

ought to +V1 = had better + V1: nên làm gì 

14. I wasn't allowed to stay out late by my parents when I was young.

be (not) allowed + to V: không được phép làm gì 

15. How long did you fly from Hanoi to Jakarta?

How long + did + S+ V1? thì QKĐ

16. George is a good cook.

S số ít + is + a/an + ADJ + N số ít 

17. Phillip is usually a hard worker.

tobe + ADV chỉ tần suất 

S số ít + is + a/an + ADJ + N số ít 

18. My brother is better at Math than me.

S + be + better than + O : ss hơn của good 

`color{orange}{~MiaMB~}`