English verb conjugation COULD PERK

Regular verb: perk - perked - perked

Affirmation

Simple form

I could perk
you could perk
she could perk
we could perk
you could perk
they could perk

V-ing form

I could be perking
you could be perking
she could be perking
we could be perking
you could be perking
they could be perking

Perfect

I could have perked
you could have perked
she could have perked
we could have perked
you could have perked
they could have perked

V-ing perfect

I could have been perking
you could have been perking
she could have been perking
we could have been perking
you could have been perking
they could have been perking

Negation

Simple form

I could not perk
you could not perk
she could not perk
we could not perk
you could not perk
they could not perk

V-ing form

I could not be perking
you could not be perking
she could not be perking
we could not be perking
you could not be perking
they could not be perking

Perfect

I could not have perked
you could not have perked
she could not have perked
we could not have perked
you could not have perked
they could not have perked

V-ing perfect

I could not have been perking
you could not have been perking
she could not have been perking
we could not have been perking
you could not have been perking
they could not have been perking

Interrogative form

Simple form

could I perk?
could you perk?
could she perk?
could we perk?
could you perk?
could they perk?

V-ing form

could I be perking?
could you be perking?
could she be perking?
could we be perking?
could you be perking?
could they be perking?

Perfect

could I have perked?
could you have perked?
could she have perked?
could we have perked?
could you have perked?
could they have perked?

V-ing perfect

could I have been perking?
could you have been perking?
could she have been perking?
could we have been perking?
could you have been perking?
could they have been perking?

Interro-negative form

Simple form

could I not perk?
could you not perk?
could she not perk?
could we not perk?
could you not perk?
could they not perk?

V-ing form

could I not be perking?
could you not be perking?
could she not be perking?
could we not be perking?
could you not be perking?
could they not be perking?

Perfect

could I not have perked?
could you not have perked?
could she not have perked?
could we not have perked?
could you not have perked?
could they not have perked?

V-ing perfect

could I not have been perking?
could you not have been perking?
could she not have been perking?
could we not have been perking?
could you not have been perking?
could they not have been perking?

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