Учила немецкий, помогите пожалуйста. Надо подчеркнуть инфинитив.
1. I think I shall be able to solve this problem.
2. We found that there was another complicated problem to consider.
3. She had two younger brothers to take care of.
4. She was too foolish to understand my explanations.
5. She is pleasant to look at.
6. He was the first to come.
7. To play chess was his greatest pleasure.
8. The child did not like to be washed.
9. Which is more pleasant: to give or to be given presents?