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 couldn't prolong
you couldn't prolong
he couldn't prolong
we couldn't prolong
you couldn't prolong
they couldn't prolong

V-ing form

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

Perfect

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

V-ing perfect

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

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

V-ing form

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

Perfect

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

V-ing perfect

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

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