1. He isn’t tall enough to be a goalkeeper.
( S + be + too + adj + (for sb) + to V
---> S + be + adj + enough + (for sb) + to V)
2. Even though he is intelligent, he doesn't study hard enough at school.
( Despite + N, main clause
---> Even though + S + V, main clause.)
3. She was busy, so she couldn't join us.
( Because >< So nên chỉ cần viết ngược lại là được )
4. If you give them the money, they will go.
( Unless = if not ---> If khẳng định, mệnh đề chính khẳng định )
5. I wish I knew her phone number.
( Cấu trúc câu wish hiện tại )