English verb conjugation COULD CONCAVE

Regular verb: concave - concaved - concaved

Affirmation

Simple form

I could concave
you could concave
he could concave
we could concave
you could concave
they could concave

V-ing form

I could be concaving
you could be concaving
he could be concaving
we could be concaving
you could be concaving
they could be concaving

Perfect

I could have concaved
you could have concaved
he could have concaved
we could have concaved
you could have concaved
they could have concaved

V-ing perfect

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

Negation

Simple form

I could not concave
you could not concave
he could not concave
we could not concave
you could not concave
they could not concave

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I concave?
could you concave?
could he concave?
could we concave?
could you concave?
could they concave?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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