English verb conjugation COULD PROLONG

Regular verb: prolong - prolonged - prolonged

Affirmation

Simple form

I could prolong
you could prolong
he could prolong
we could prolong
you could prolong
they could prolong

V-ing form

I could be prolonging
you could be prolonging
he could be prolonging
we could be prolonging
you could be prolonging
they could be prolonging

Perfect

I could have prolonged
you could have prolonged
he could have prolonged
we could have prolonged
you could have prolonged
they could have prolonged

V-ing perfect

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

Negation

Simple form

I could not prolong
you could not prolong
he could not prolong
we could not prolong
you could not prolong
they could not prolong

V-ing form

I could not be prolonging
you could not be prolonging
he could not be prolonging
we could not be prolonging
you could not be prolonging
they could not be prolonging

Perfect

I could not have prolonged
you could not have prolonged
he could not have prolonged
we could not have prolonged
you could not have prolonged
they could not have prolonged

V-ing perfect

I could not have been prolonging
you could not have been prolonging
he could not have been prolonging
we could not have been prolonging
you could not have been prolonging
they could not have been prolonging

Interrogative form

Simple form

could I prolong?
could you prolong?
could he prolong?
could we prolong?
could you prolong?
could they prolong?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

could I not prolong?
could you not prolong?
could he not prolong?
could we not prolong?
could you not prolong?
could they not prolong?

V-ing form

could I not be prolonging?
could you not be prolonging?
could he not be prolonging?
could we not be prolonging?
could you not be prolonging?
could they not be prolonging?

Perfect

could I not have prolonged?
could you not have prolonged?
could he not have prolonged?
could we not have prolonged?
could you not have prolonged?
could they not have prolonged?

V-ing perfect

could I not have been prolonging?
could you not have been prolonging?
could he not have been prolonging?
could we not have been prolonging?
could you not have been prolonging?
could they not have been prolonging?

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