English verb conjugation COULD PERK

Regular verb: perk - perked - perked

Affirmation

Simple form

I could perk
you could perk
he could perk
we could perk
you could perk
they could perk

V-ing form

I could be perking
you could be perking
he could be perking
we could be perking
you could be perking
they could be perking

Perfect

I could have perked
you could have perked
he 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
he could have been perking
we could have been perking
you could have been perking
they could have been perking

Negation

Simple form

I couldn't perk
you couldn't perk
he couldn't perk
we couldn't perk
you couldn't perk
they couldn't perk

V-ing form

I couldn't be perking
you couldn't be perking
he couldn't be perking
we couldn't be perking
you couldn't be perking
they couldn't be perking

Perfect

I couldn't have perked
you couldn't have perked
he couldn't have perked
we couldn't have perked
you couldn't have perked
they couldn't have perked

V-ing perfect

I couldn't have been perking
you couldn't have been perking
he couldn't have been perking
we couldn't have been perking
you couldn't have been perking
they couldn't have been perking

Interrogative form

Simple form

could I perk?
could you perk?
could he perk?
could we perk?
could you perk?
could they perk?

V-ing form

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

Perfect

could I have perked?
could you have perked?
could he 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 he have been perking?
could we have been perking?
could you have been perking?
could they have been perking?

Interro-negative form

Simple form

couldn't I perk?
couldn't you perk?
couldn't he perk?
couldn't we perk?
couldn't you perk?
couldn't they perk?

V-ing form

couldn't I be perking?
couldn't you be perking?
couldn't he be perking?
couldn't we be perking?
couldn't you be perking?
couldn't they be perking?

Perfect

couldn't I have perked?
couldn't you have perked?
couldn't he have perked?
couldn't we have perked?
couldn't you have perked?
couldn't they have perked?

V-ing perfect

couldn't I have been perking?
couldn't you have been perking?
couldn't he have been perking?
couldn't we have been perking?
couldn't you have been perking?
couldn't they have been perking?

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