English verb conjugation COULD CONCERT

Regular verb: concert - concerted - concerted

Affirmation

Simple form

I could concert
you could concert
she could concert
we could concert
you could concert
they could concert

V-ing form

I could be concerting
you could be concerting
she could be concerting
we could be concerting
you could be concerting
they could be concerting

Perfect

I could have concerted
you could have concerted
she could have concerted
we could have concerted
you could have concerted
they could have concerted

V-ing perfect

I could have been concerting
you could have been concerting
she could have been concerting
we could have been concerting
you could have been concerting
they could have been concerting

Negation

Simple form

I could not concert
you could not concert
she could not concert
we could not concert
you could not concert
they could not concert

V-ing form

I could not be concerting
you could not be concerting
she could not be concerting
we could not be concerting
you could not be concerting
they could not be concerting

Perfect

I could not have concerted
you could not have concerted
she could not have concerted
we could not have concerted
you could not have concerted
they could not have concerted

V-ing perfect

I could not have been concerting
you could not have been concerting
she could not have been concerting
we could not have been concerting
you could not have been concerting
they could not have been concerting

Interrogative form

Simple form

could I concert?
could you concert?
could she concert?
could we concert?
could you concert?
could they concert?

V-ing form

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

Perfect

could I have concerted?
could you have concerted?
could she have concerted?
could we have concerted?
could you have concerted?
could they have concerted?

V-ing perfect

could I have been concerting?
could you have been concerting?
could she have been concerting?
could we have been concerting?
could you have been concerting?
could they have been concerting?

Interro-negative form

Simple form

could I not concert?
could you not concert?
could she not concert?
could we not concert?
could you not concert?
could they not concert?

V-ing form

could I not be concerting?
could you not be concerting?
could she not be concerting?
could we not be concerting?
could you not be concerting?
could they not be concerting?

Perfect

could I not have concerted?
could you not have concerted?
could she not have concerted?
could we not have concerted?
could you not have concerted?
could they not have concerted?

V-ing perfect

could I not have been concerting?
could you not have been concerting?
could she not have been concerting?
could we not have been concerting?
could you not have been concerting?
could they not have been concerting?

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