English verb conjugation COULD YOWL

Regular verb: yowl - yowled - yowled

Affirmation

Simple form

I could yowl
you could yowl
she could yowl
we could yowl
you could yowl
they could yowl

V-ing form

I could be yowling
you could be yowling
she could be yowling
we could be yowling
you could be yowling
they could be yowling

Perfect

I could have yowled
you could have yowled
she could have yowled
we could have yowled
you could have yowled
they could have yowled

V-ing perfect

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

Negation

Simple form

I could not yowl
you could not yowl
she could not yowl
we could not yowl
you could not yowl
they could not yowl

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I yowl?
could you yowl?
could she yowl?
could we yowl?
could you yowl?
could they yowl?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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