1. He doesn't drink enough water.
2. He's going to stay at home because he is too tired.
3. Do you have enough money?
4. Are thoes shoes big enough?
5. She can't watch the film because she isn't old enough.
6. I can't run very far because I'm not fit enough.
7. My dad's always at work. He works hard enough.
8. I wanted to join the football team but they had enough players.