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 couldn't concertina
you couldn't concertina
he couldn't concertina
we couldn't concertina
you couldn't concertina
they couldn't concertina

V-ing form

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

Perfect

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

V-ing perfect

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

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

V-ing form

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

Perfect

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

V-ing perfect

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

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