English verb conjugation COULD ABSTAIN

Regular verb: abstain - abstained - abstained

Affirmation

Simple form

I could abstain
you could abstain
she could abstain
we could abstain
you could abstain
they could abstain

V-ing form

I could be abstaining
you could be abstaining
she could be abstaining
we could be abstaining
you could be abstaining
they could be abstaining

Perfect

I could have abstained
you could have abstained
she could have abstained
we could have abstained
you could have abstained
they could have abstained

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I abstain?
could you abstain?
could she abstain?
could we abstain?
could you abstain?
could they abstain?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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