Ta áp dụng cấu trúc enough 

S + be+ adj+ enough ( for sb ) + to V

` 20 ` : He has enough money to buy a car

` 21 ` : He is intelligent enough to do it

` 22 ` : Tom is strong enough to lift the box

` 23 ` : The weather is fine enough for Mary and her little brother to go to school

` 24 ` : The moon is warm enough for us  to live on it

20. He has enough money to buy a car.

- "enough" với danh từ: S + V + enough + N + (for sb) + to V.

21. He is very intelligent enough to do it.

- "enough" với tính từ: S + tobe + adj + enough + (for sb) + to V.

22. Tom is strong enough to lift the box.

- S + tobe + adj + (not) + enough + (for sb) + to V: Đủ/ Không đủ để làm gì.

23. The weather is fine enough for Mary and her little brother to go to school.

- S + tobe + adj + (not) + enough + (for sb) + to V: Đủ/ Không đủ để làm gì.

24. The moon is warm enough for us to live on it.

- S + tobe + adj + (not) + enough + (for sb) + to V: Đủ/ Không đủ để làm gì.