English verb conjugation COULD COUNTERVAIL

Regular verb: countervail - countervailed - countervailed

Affirmation

Simple form

I could countervail
you could countervail
she could countervail
we could countervail
you could countervail
they could countervail

V-ing form

I could be countervailing
you could be countervailing
she could be countervailing
we could be countervailing
you could be countervailing
they could be countervailing

Perfect

I could have countervailed
you could have countervailed
she could have countervailed
we could have countervailed
you could have countervailed
they could have countervailed

V-ing perfect

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

Negation

Simple form

I couldn't countervail
you couldn't countervail
she couldn't countervail
we couldn't countervail
you couldn't countervail
they couldn't countervail

V-ing form

I couldn't be countervailing
you couldn't be countervailing
she couldn't be countervailing
we couldn't be countervailing
you couldn't be countervailing
they couldn't be countervailing

Perfect

I couldn't have countervailed
you couldn't have countervailed
she couldn't have countervailed
we couldn't have countervailed
you couldn't have countervailed
they couldn't have countervailed

V-ing perfect

I couldn't have been countervailing
you couldn't have been countervailing
she couldn't have been countervailing
we couldn't have been countervailing
you couldn't have been countervailing
they couldn't have been countervailing

Interrogative form

Simple form

could I countervail?
could you countervail?
could she countervail?
could we countervail?
could you countervail?
could they countervail?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

couldn't I countervail?
couldn't you countervail?
couldn't she countervail?
couldn't we countervail?
couldn't you countervail?
couldn't they countervail?

V-ing form

couldn't I be countervailing?
couldn't you be countervailing?
couldn't she be countervailing?
couldn't we be countervailing?
couldn't you be countervailing?
couldn't they be countervailing?

Perfect

couldn't I have countervailed?
couldn't you have countervailed?
couldn't she have countervailed?
couldn't we have countervailed?
couldn't you have countervailed?
couldn't they have countervailed?

V-ing perfect

couldn't I have been countervailing?
couldn't you have been countervailing?
couldn't she have been countervailing?
couldn't we have been countervailing?
couldn't you have been countervailing?
couldn't they have been countervailing?

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