Помогите решить пожалуйста.
Прочитайте и перепишите приведенные ниже предложения, подчеркните в каждом из них синоним или эквивалент модального глагола. Определите модальный глагол, синонимом или эквивалентом которого он является.

1. Tom might not be able to come tomorrow.
2. She stayed in bed this morning because she didn’t have to go to work.
3. According to the contract, the goods are to arrive at the port at the end of the week.
4. As the manager was out he had to wait for five minutes.
5. She was allowed to practise the piano any time.