Ответ:

№3

2. confident enough

3. enough milk

4. warm enough

5. enough time

6. good enough  

№4

2. I am not old enough to see that horror film.

3. These jeans are too wet to wear.  

4. His car is too slow.

5. He is not generous enough to pay for my ticket.

6. The film was too short.

7. He is not popular enough to win the award.

8. She is too impatient to wait.