form

present tense

affirmative

negative

interrogative

I /you /he /she /it /we /they can
I /you /he /she /it /we /they cannot / can’t
can I /you /he /she /it /we /they?

past tense

affirmative

negative

interrogative

I /you /he /she /it /we /they could
I /you /he /she /it /we /they could not / couldn’t
could I /you /he /she /it /we /they?

present tense

affirmative

negative

interrogative

I am able to
you are able to
he /she /it is able to
we are able to
they  are able to
I am not able to
you are not / aren’t able to
he /she /it is not / isn’t able to
we are not / aren’t able to
they are not / aren’t able to
am I able to?
are you able to?
is he /she /it able to
are we able to?
are they  able to?

past tense

affirmative

negative

interrogative

I am able to
you are able to
he /she /it is able to
we are able to
they  are able to
I am not able to
you are not / aren’t able to
he /she /it is not / isn’t able to
we are not / aren’t able to
they are not / aren’t able to
am I able to?
are you able to?
is he /she /it able to?
are we able to?
are they  able to?

exercises

can and can’t  (elementary)

 can and could (elementary)

to be able to

  • exercise 1: fill in the correct verb forms of to be able to

Useful pages

  • exercises for practising modalities: ability, permission, advice, deduction and probability, necessity and obligation and request