English verb conjugation COULD BUTTRESS

Regular verb: buttress - buttressed - buttressed

Affirmation

Simple form

I could buttress
you could buttress
he could buttress
we could buttress
you could buttress
they could buttress

V-ing form

I could be buttressing
you could be buttressing
he could be buttressing
we could be buttressing
you could be buttressing
they could be buttressing

Perfect

I could have buttressed
you could have buttressed
he could have buttressed
we could have buttressed
you could have buttressed
they could have buttressed

V-ing perfect

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

Negation

Simple form

I could not buttress
you could not buttress
he could not buttress
we could not buttress
you could not buttress
they could not buttress

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I buttress?
could you buttress?
could he buttress?
could we buttress?
could you buttress?
could they buttress?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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