*Nếu dùng cấu trúc enough...to
-My friends aren't strong enough to go to school.
Vì ta có cấu trúc(S+tobe+adj+enough+to+V)
*Nếu dùng cấu trúc wish trong tương lai
-I wish my friend would be strong to go to school
Vì ta có cấu trúc(S1+wish/wishes+S2+V)