English verb conjugation COULD PREVAIL

Regular verb: prevail - prevailed - prevailed

Affirmation

Simple form

I could prevail
you could prevail
he could prevail
we could prevail
you could prevail
they could prevail

V-ing form

I could be prevailing
you could be prevailing
he could be prevailing
we could be prevailing
you could be prevailing
they could be prevailing

Perfect

I could have prevailed
you could have prevailed
he could have prevailed
we could have prevailed
you could have prevailed
they could have prevailed

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I prevail?
could you prevail?
could he prevail?
could we prevail?
could you prevail?
could they prevail?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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