Question

Transformation:
8 His father is very poor. He can't buy a big house
-> His father doesn't have
9 The weather is very cold. They can't have a picnic
-> The weather isn't
10 This exercise is too difficult. He can't do it
-> This exercise isn't

Answer 1

8, His father doesn't have enough money to buy a big house. 

9, The weather isn't warm enough for them to have a picnic. 

10, This exercise isn't easy enough for him to do it.

Cấu trúc enough to : S + be + adj + enough + (for sb) + to V.