- Use 'must' and 'have to' to express obligation in English. They are very similar but:
'have to' is more common for external, general obligations: 'You have to fasten your seat belt on a plane'
'must' is more common for specific or personal obligations: 'I must study harder if I want to pass the test'
In the past we use 'had to' for obligations: 'She had to wear a uniform when she worked for British Airways'
- Use 'don´t have to' to say there's no obligation or something is not necessary:
'You don´t have to get up early tomorrow. It's Saturday'
- Use 'mustn't', 'can't' or 'not be allowed to', to express prohibition in English:
'You´re not allowed to buy alcoholic drinks after 10:00'
- Use 'should', 'shouldn't' or 'ought to' 'ought not to' to give your opinion or some advice:
'She should be more careful when she drives. She´s had to accidents in one week!'
For strong recommendations you can also use 'must', 'have to': 'Los Miserables is fantastic. You must see it'
Activity 2: Complete the sentences with the words provided.
