Modal Ability

Modal Verbs Use:

We use Modal verbs to express: Abilities, Requests, Advice, Offers, Deductions, Commands, and Probabilities. The same modal verb can have different meanings: i.e. 
Can I borrow your CD?            Request         
I can speak Spanish well!
     
Ability
These verbs are often called  modal auxiliary verbs, because they don’t need an auxiliary to form a negative or interrogative phrase.
ex: I can’t speak Spanish well. not  I do not can speak Spanish well.
Modal verbs can be can be formed in the past, present or future: the forms may change accordingly:
ex: I can ski very well   (Present)
      I could ski very well  (Past)
      I am able to ski very well (Future)

Note Important! Modal verbs never go with to and no  s  in the third person.
In this section we are going to look at the modal verbs that are used to give advice:

 

Form: Subject + Modal +Verb

Can

Could

Be able to

 

Affirmative form

Long formsContracted forms
You can play the piano well.
not possible
He could swim very fast.
They will be able to cook very well.

Negative form

 
Long formsContracted forms

I can not play football.     

I can’t play football.
You could not play rugby.
You couldn’t play rugby.
He/she/it will not be able to speak Italian.
He/she/it won’t be able to speak Italian.
 

Interrogative form

 
Long formsContracted forms
Can you play rugby?        not possible
Could they play cards when they were younger?
Is he/she/it able to speak Italian?