The Modals Verbs

1. Advice and Criticism: We use should and ougth to + bare infinitive to give advice We use should and ougth to + bare infinitive to express our opinion, to talk about what we think is right or wrong

2. Request, offers & suggestion: We use can, could, will or would to ask someone to do something for us. Could and would are more polite.

3. Obligation & necessity: We use must, have(got) to or need to to express obligation or to say that something is necessary We use must to talk about the present of future Have got to to talk about the present or future

4. Lack of obligation & prohibition: We use don´t have to, don´t need to or needn´t to talk about something that is not necessary in the present future We use didn´t have to or didn´t need to + past participle to talk about something that was not necessary in the past

5. Ability: We use can for a general ability in the present . Could for a general ability in the past Was/were able to for a single specific ability in the past

6. Deduction: We use should and ougth to + bare infinitive to show that we are almost certain that something is true. Can´t + bare infinitive to show that we are almost certain that something is not true

7. Permission: We use can, could or many to ask for permission. Could and may are more polite than can. Can or may to give or refuse permission.

8. Posibility: We use may, migth or could + bare infinitiveto talk about possibility in the present or in the future .