Вопрос по английскому языку:

подчеркните модальный глагол или его эквивалент
1) Most people have to work in order to make a living.
2) If a company goes bankrupt, it cannot pay back the money it owes and it must close down.
3) Governments may put limits on free enterprise by banning trade in various goods, preventing monopolies and protecting consumers and the environment.