English verb conjugation COULD ABSTAIN

Regular verb: abstain - abstained - abstained

Affirmation

Simple form

I could abstain
you could abstain
he could abstain
we could abstain
you could abstain
they could abstain

V-ing form

I could be abstaining
you could be abstaining
he could be abstaining
we could be abstaining
you could be abstaining
they could be abstaining

Perfect

I could have abstained
you could have abstained
he 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
he 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
he 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
he 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
he 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
he 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 he abstain?
could we abstain?
could you abstain?
could they abstain?

V-ing form

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

Perfect

could I have abstained?
could you have abstained?
could he 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 he 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 he 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 he 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 he 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 he 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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