English verb conjugation COULD POSTMARK

Regular verb: postmark - postmarked - postmarked

Affirmation

Simple form

I could postmark
you could postmark
he could postmark
we could postmark
you could postmark
they could postmark

V-ing form

I could be postmarking
you could be postmarking
he could be postmarking
we could be postmarking
you could be postmarking
they could be postmarking

Perfect

I could have postmarked
you could have postmarked
he could have postmarked
we could have postmarked
you could have postmarked
they could have postmarked

V-ing perfect

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

Negation

Simple form

I could not postmark
you could not postmark
he could not postmark
we could not postmark
you could not postmark
they could not postmark

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I postmark?
could you postmark?
could he postmark?
could we postmark?
could you postmark?
could they postmark?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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