Cấu trúc:Khẳng định: S+tobe+adj+enough+(for sb)+to V(V nguyên thể)

               Phủ định:    S+ tobe+not+enough+(forsb)+to V(V nguyên thể)

1.She is tall enough to reach the top of the cupboard.

2.The ladder isn't long enough to reach the window.

3.He is strong enough to carry the suitcase.

4.The house was not cheap enough for us to buy.

5.He wasn't patient enough to wait for you.

6.The chair isn't comfortable enough for me to sit.

7.These orange aren't sweet enough for us to eat.

8.You aren't well enough to go to school today.

9.I'm not strong enough to help you.