English verb conjugation CAN CHECK

Regular verb: check - checked - checked

Affirmation

Simple form

I can check
you can check
he can check
we can check
you can check
they can check

V-ing form

I can be checking
you can be checking
he can be checking
we can be checking
you can be checking
they can be checking

Perfect

I can have checked
you can have checked
he can have checked
we can have checked
you can have checked
they can have checked

V-ing perfect

I can have been checking
you can have been checking
he can have been checking
we can have been checking
you can have been checking
they can have been checking

Negation

Simple form

I cannot check
you cannot check
he cannot check
we cannot check
you cannot check
they cannot check

V-ing form

I cannot be checking
you cannot be checking
he cannot be checking
we cannot be checking
you cannot be checking
they cannot be checking

Perfect

I cannot have checked
you cannot have checked
he cannot have checked
we cannot have checked
you cannot have checked
they cannot have checked

V-ing perfect

I cannot have been checking
you cannot have been checking
he cannot have been checking
we cannot have been checking
you cannot have been checking
they cannot have been checking

Interrogative form

Simple form

can I check?
can you check?
can he check?
can we check?
can you check?
can they check?

V-ing form

can I be checking?
can you be checking?
can he be checking?
can we be checking?
can you be checking?
can they be checking?

Perfect

can I have checked?
can you have checked?
can he have checked?
can we have checked?
can you have checked?
can they have checked?

V-ing perfect

can I have been checking?
can you have been checking?
can he have been checking?
can we have been checking?
can you have been checking?
can they have been checking?

Interro-negative form

Simple form

can I not check?
can you not check?
can he not check?
can we not check?
can you not check?
can they not check?

V-ing form

can I not be checking?
can you not be checking?
can he not be checking?
can we not be checking?
can you not be checking?
can they not be checking?

Perfect

can I not have checked?
can you not have checked?
can he not have checked?
can we not have checked?
can you not have checked?
can they not have checked?

V-ing perfect

can I not have been checking?
can you not have been checking?
can he not have been checking?
can we not have been checking?
can you not have been checking?
can they not have been checking?

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