5.- Have to, don´t have to, can and can´t
Have to expressed obligation and don´t have to means there is no obligation.
| Affirmative | Negative | Question |
| You have to get up early | I don´t have to study tonight He doesn´t have to buy lunch | Do we have to go now? Doeshe have to wear a tie? |
Can expresses ability or possibility. Can´t expressed lack of ability and prohibition. Can is a modal verb (like will, should, etc.)After modalverbs we use the infinitive without to with all persons.
| Affirmative | Negative | Question | Short answers |
| I can drive very well | You can´t park here. She can´t dance | Can you ride a bike? Can you bring music? | Yes, I can No, I can´t. |












