Modal verbs are followed by BARE INFINITVEMy mother can goes to the theatre.Mary can sings sing really nice.My father could spoke 3 languages.You coudn’t payed pay by credit card in this shop some years ago.I must to write my exam in English

ABILITY I can read in English. I am able to read in English.ASKING FOR PERMISSION or GIVING PERMISSIONCan I go to the toilet, please?You can enter this pub.POSSIBILITY // IMPOSSIBILITY (in the negative form)The doctor can see you now.The doctor has an appointment and he can’t see you.

ABILITY (in the past tense) I could hold my breath for 2 minutes when I was young.POSSIBILITY // IMPOSSIBILTY (in the past tense)You could see a film for only 5 cents in the 60s.I couldn’t buy you flowers yesterday. The florist was closed.ASK FOR PERMISSION (more formal than can) (used in the present tense)Could you pick me up from the bus station?

OBLIGATIONS (in the affirmative) You must carry your ID when you take a flight.(You are obliged to carry your ID when taking a flight)Must can’t be used in the past tense, just in present and future tenses.People must get married in the church some decades ago.

OBLIGATIONS (in the affirmative)Past:You must use have to for the past instead of mustPeople had to get married in the church some decades ago.Present:I have to wear my laptop to the school.Paul has to wake up early everyday.Future:Passangers will have to remain seated during the take-off.

PROHIBITIONS (always in the negative form and in present and future tenses)It’s illegalIt’s forbiddenIt’s banned TO DRIVE DRUNK IN SPAINIt’s prohibitedIt isn’t permittedYou are not allowedYOU MUSTN’T DRIVE DRUNK IN SPAIN

https://www.youtube.com/watch?v=QuL_FtLktsw It was illegalIt was forbiddenIt was prohibitedIt was banned TO GET ADIVORCE IN THE PASTIt wasn’t permittedYou were not allowed

YOU COULDN’T GET A DIVORCE IN THE PAST