Form
modal + base verb (no -s, no to, no do/does): can, could, may, might, must, should
| Affirmative | Negative | Question |
|---|
| She can swim. / You must go. | He can't swim. / You mustn't go. | Can she swim? / Should I go? |
Use
- Ability: can / could (past): I could swim when I was five.
- Permission and requests: Can I open the window? Could you help me? May I come in?
- Obligation and prohibition: You must wear a seatbelt. You mustn't smoke here.
- No obligation: You don't have to come early.
- Advice: You should see a doctor. You shouldn't eat so much sugar.
- Possibility: It might rain tomorrow.
- Deduction: She must be at home (sure). He can't be at work (impossible).
Watch out
She cans swim → She can swim. I must to go → I must go.Does she can swim? → Can she swim?- mustn't = prohibited; don't have to = not necessary.
En español
Modales + verbo base: can = poder/saber, must = deber (obligación), should = debería (consejo), might = quizás. No llevan -s ni to. Mustn't = prohibido; don't have to = no es necesario.
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