English verb conjugation COULD VAIL

Regular verb: vail - vailed - vailed

Affirmation

Simple form

I could vail
you could vail
he could vail
we could vail
you could vail
they could vail

V-ing form

I could be vailing
you could be vailing
he could be vailing
we could be vailing
you could be vailing
they could be vailing

Perfect

I could have vailed
you could have vailed
he could have vailed
we could have vailed
you could have vailed
they could have vailed

V-ing perfect

I could have been vailing
you could have been vailing
he could have been vailing
we could have been vailing
you could have been vailing
they could have been vailing

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I vail?
could you vail?
could he vail?
could we vail?
could you vail?
could they vail?

V-ing form

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

Perfect

could I have vailed?
could you have vailed?
could he have vailed?
could we have vailed?
could you have vailed?
could they have vailed?

V-ing perfect

could I have been vailing?
could you have been vailing?
could he have been vailing?
could we have been vailing?
could you have been vailing?
could they have been vailing?

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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