1. The children were so excited .He couldn't laugh cheerfully.(too....to)

=> The children were too excited for him to laugh cheerfully.

2.He is very intelligent.He can do these exercises(enough to)

=> He is intelligent enough to do these exercises.

3. She is very busy.She has no time to go with him.(too....to)

=> She is too busy to go with him.

4. She is clever .She can do everything by herself(enough)

=> She is clever enough to do everything by herself.

5. They are very strong. Theycan do all day(enough)

=> They are strong enough to do all day.

6. The water is very hot .I can't drink(too)

=> The water is too hot for me to drink.