English verb conjugation COULD CONCERTINA

Regular verb: concertina - concertinaed - concertinaed

Affirmation

Simple form

I could concertina
you could concertina
he could concertina
we could concertina
you could concertina
they could concertina

V-ing form

I could be concertinaing
you could be concertinaing
he could be concertinaing
we could be concertinaing
you could be concertinaing
they could be concertinaing

Perfect

I could have concertinaed
you could have concertinaed
he could have concertinaed
we could have concertinaed
you could have concertinaed
they could have concertinaed

V-ing perfect

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

Negation

Simple form

I could not concertina
you could not concertina
he could not concertina
we could not concertina
you could not concertina
they could not concertina

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I concertina?
could you concertina?
could he concertina?
could we concertina?
could you concertina?
could they concertina?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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