English verb conjugation COULD PLUMB

Regular verb: plumb - plumbed - plumbed

Affirmation

Simple form

I could plumb
you could plumb
he could plumb
we could plumb
you could plumb
they could plumb

V-ing form

I could be plumbing
you could be plumbing
he could be plumbing
we could be plumbing
you could be plumbing
they could be plumbing

Perfect

I could have plumbed
you could have plumbed
he could have plumbed
we could have plumbed
you could have plumbed
they could have plumbed

V-ing perfect

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

Negation

Simple form

I could not plumb
you could not plumb
he could not plumb
we could not plumb
you could not plumb
they could not plumb

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I plumb?
could you plumb?
could he plumb?
could we plumb?
could you plumb?
could they plumb?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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