This document discusses the proper use of modal verbs followed by bare infinitives in English. It explains that modal verbs like can, could, may, might, must, shall, should, will, would are followed by bare infinitives without "to." The modal verbs express abilities, permissions, possibilities, obligations, and prohibitions. For example, "I can read in English" means I am able to read, while "you must carry your ID" expresses an obligation. The tense of the modal verb indicates whether the action is present, past, or future.

2.  Modal verbs are followed by BARE INFINITVE
My 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

3. ABILITY
I can read in English.  I am able to read in English.
ASKING FOR PERMISSION or GIVING PERMISSION
Can 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.

4. 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?

5. 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.

6. OBLIGATIONS (in the affirmative)
Past:
You must use have to for the past instead of must
People 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.

7.  PROHIBITIONS (always in the negative form and in present
and future tenses)
It’s illegal
It’s forbidden
It’s banned TO DRIVE DRUNK IN SPAIN
It’s prohibited
It isn’t permitted
You are not allowed
YOU MUSTN’T DRIVE DRUNK IN SPAIN

8.  https://www.youtube.com/watch?v=QuL_FtLktsw
It was illegal
It was forbidden
It was prohibited
It was banned TO GET ADIVORCE IN THE PAST
It wasn’t permitted
You were not allowed
YOU COULDN’T GET A DIVORCE IN THE PAST