English verb conjugation COULD YOWL

Regular verb: yowl - yowled - yowled

Affirmation

Simple form

I could yowl
you could yowl
he could yowl
we could yowl
you could yowl
they could yowl

V-ing form

I could be yowling
you could be yowling
he could be yowling
we could be yowling
you could be yowling
they could be yowling

Perfect

I could have yowled
you could have yowled
he 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
he could have been yowling
we could have been yowling
you could have been yowling
they could have been yowling

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I yowl?
could you yowl?
could he yowl?
could we yowl?
could you yowl?
could they yowl?

V-ing form

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

Perfect

could I have yowled?
could you have yowled?
could he 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 he have been yowling?
could we have been yowling?
could you have been yowling?
could they have been yowling?

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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