English verb conjugation CAN KNOCK

Regular verb: knock - knocked - knocked

Affirmation

Simple form

I can knock
you can knock
she can knock
we can knock
you can knock
they can knock

V-ing form

I can be knocking
you can be knocking
she can be knocking
we can be knocking
you can be knocking
they can be knocking

Perfect

I can have knocked
you can have knocked
she can have knocked
we can have knocked
you can have knocked
they can have knocked

V-ing perfect

I can have been knocking
you can have been knocking
she can have been knocking
we can have been knocking
you can have been knocking
they can have been knocking

Negation

Simple form

I cannot knock
you cannot knock
she cannot knock
we cannot knock
you cannot knock
they cannot knock

V-ing form

I cannot be knocking
you cannot be knocking
she cannot be knocking
we cannot be knocking
you cannot be knocking
they cannot be knocking

Perfect

I cannot have knocked
you cannot have knocked
she cannot have knocked
we cannot have knocked
you cannot have knocked
they cannot have knocked

V-ing perfect

I cannot have been knocking
you cannot have been knocking
she cannot have been knocking
we cannot have been knocking
you cannot have been knocking
they cannot have been knocking

Interrogative form

Simple form

can I knock?
can you knock?
can she knock?
can we knock?
can you knock?
can they knock?

V-ing form

can I be knocking?
can you be knocking?
can she be knocking?
can we be knocking?
can you be knocking?
can they be knocking?

Perfect

can I have knocked?
can you have knocked?
can she have knocked?
can we have knocked?
can you have knocked?
can they have knocked?

V-ing perfect

can I have been knocking?
can you have been knocking?
can she have been knocking?
can we have been knocking?
can you have been knocking?
can they have been knocking?

Interro-negative form

Simple form

can I not knock?
can you not knock?
can she not knock?
can we not knock?
can you not knock?
can they not knock?

V-ing form

can I not be knocking?
can you not be knocking?
can she not be knocking?
can we not be knocking?
can you not be knocking?
can they not be knocking?

Perfect

can I not have knocked?
can you not have knocked?
can she not have knocked?
can we not have knocked?
can you not have knocked?
can they not have knocked?

V-ing perfect

can I not have been knocking?
can you not have been knocking?
can she not have been knocking?
can we not have been knocking?
can you not have been knocking?
can they not have been knocking?

Page top