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 couldn't concert
you couldn't concert
she couldn't concert
we couldn't concert
you couldn't concert
they couldn't concert

V-ing form

I couldn't be concerting
you couldn't be concerting
she couldn't be concerting
we couldn't be concerting
you couldn't be concerting
they couldn't be concerting

Perfect

I couldn't have concerted
you couldn't have concerted
she couldn't have concerted
we couldn't have concerted
you couldn't have concerted
they couldn't have concerted

V-ing perfect

I couldn't have been concerting
you couldn't have been concerting
she couldn't have been concerting
we couldn't have been concerting
you couldn't have been concerting
they couldn't 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

couldn't I concert?
couldn't you concert?
couldn't she concert?
couldn't we concert?
couldn't you concert?
couldn't they concert?

V-ing form

couldn't I be concerting?
couldn't you be concerting?
couldn't she be concerting?
couldn't we be concerting?
couldn't you be concerting?
couldn't they be concerting?

Perfect

couldn't I have concerted?
couldn't you have concerted?
couldn't she have concerted?
couldn't we have concerted?
couldn't you have concerted?
couldn't they have concerted?

V-ing perfect

couldn't I have been concerting?
couldn't you have been concerting?
couldn't she have been concerting?
couldn't we have been concerting?
couldn't you have been concerting?
couldn't they have been concerting?

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