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 couldn't concave
you couldn't concave
he couldn't concave
we couldn't concave
you couldn't concave
they couldn't concave

V-ing form

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

Perfect

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

V-ing perfect

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

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

V-ing form

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

Perfect

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

V-ing perfect

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

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