MODALS VERBS

Obligation

Yes Must: Deber(Obligación) Have to: Tener que

Example: You must finish your work. You have to work harder. No

Don’t have to: No tener que

Example: You don’t have to take an umbrella, it isn’t going to rain

Posibility

Could: Podía/Podría Might: Podría/Puede que May: Quizás/Podría

Example: You could be wrong. I may visit Susan on Monday. They might be waiting for us at the station.

Advice Yes:

Should: Deber(Consejo) Ought to: Deber(Consejo moral) No se usa

Example: You ought to visit your grandmother more often. We should go to sleep.

No: Shouldn’t: No deber(consejo)

Example: You should not say that

Certainty

Must: 100% sure Should: Quite sure

Example: She should be doing her homework. Julia must be in Paris by now.

Permision Yes:

Can: PoderExample: You can sit here if you like.

No:Mustn’t: No deberCan’t: No poder

Example: Mr. Williams mustn’t smoke here. You can't tell me what to do.