English verb conjugation COULD BUTTON

Regular verb: button - buttoned - buttoned

Affirmation

Simple form

I could button
you could button
he could button
we could button
you could button
they could button

V-ing form

I could be buttoning
you could be buttoning
he could be buttoning
we could be buttoning
you could be buttoning
they could be buttoning

Perfect

I could have buttoned
you could have buttoned
he could have buttoned
we could have buttoned
you could have buttoned
they could have buttoned

V-ing perfect

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

Negation

Simple form

I could not button
you could not button
he could not button
we could not button
you could not button
they could not button

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I button?
could you button?
could he button?
could we button?
could you button?
could they button?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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