English verb conjugation COULD CONCAVE

Regular verb: concave - concaved - concaved

Affirmation

Simple form

I could concave
you could concave
she could concave
we could concave
you could concave
they could concave

V-ing form

I could be concaving
you could be concaving
she could be concaving
we could be concaving
you could be concaving
they could be concaving

Perfect

I could have concaved
you could have concaved
she 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
she 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
she 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
she 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
she 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
she 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 she concave?
could we concave?
could you concave?
could they concave?

V-ing form

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

Perfect

could I have concaved?
could you have concaved?
could she 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 she 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 she 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 she 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 she 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 she 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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