1. Verbos auxiliares irregulares
MODAL VERBS
Verbos auxiliares irregulares

2. Can Can I come in? (permission) She can speak English. (ability)
They can not dance Tango.
Robbie cannot arrive late today.
Mary can’t go away now.
What can you do?

3. Could – Past of Can Could you walk when you were four?
He could watch tv in the morning.
We could not carry that bag.
Sophie couldn’t listen to him.
Where could you go by yourself when you were a child?

4. Could – Presente ou Futuro
I could travel to LA this evening. (possibility)
Could you pass me the sugar? (Request)

5. May She may open the door. (ability)
Rebecca and I may not park the car here.
May I go to the bathroom? (permission)
Carol may come tomorrow, I don’t know. (possibility in the future)

6. Might
I might call you. = Maybe I’ll call you. (possibility in the future)
It might not rain tonight.
POSSIBILITY:
Susan may work on Sunday. (50% sure)
Gabriel might stop working. (30% sure)

7. Must = have to
I must read these books until the ending of these month. (have to)
Must you answer this question?
Peter and Paul must write the letter.
The dog must not sleep over there.
The girls mustn’t scream.
It must be Tonny arriving. (conclusion)

8. Should You should exercise more. (advice)
I should not eat so many sweets.
Willian shouldn’t win the game. He is the slowest in this competion. (deduction)
Your bagage should be let in the hall, because the bellman is going to take it. (obligation)
Should you smoke?

9. Ought to
Chris ought to brush his teeth at least 3 times a day. (advice)
Henry ought not to behave like that.
Ought you to telephone her?