Example: It was the best time when she could find them at home. — It was the best time for her to find them at home.
1. Here is a simple English book that you can read.
2. The first thing they must do when they arrive is to phone home.
3. This is a problem you should solve by yourself.
4. There is nothing that we can add.
5. These are children you can play with.
6. It is not a question you may laugh at.​