В конце предложений, в скобочках стоят - и ? Минус это значит нужно переделать предложение в отрицательную форму, а вопрос значит нужно переделать предложение в вопросительную форму.
1. They had breakfast at 10 o'clock. (-)
2. Sheila and the children had to have breakfast without Tom. (?)
3. Timmy must stop crying. (-)
4. He may drink his bottle of milk. (?)
5. Tom hasn't got enough time to have breakfast with his family. (?)
6. After breakfast Sheila had a shower. (-)
7. The children could put on their clothes on their own. (-)
8. Afterwards they should go out to play. (?)
9. Sheila did the washing-up. (-)