English verb conjugation COULD TREPHINE

Regular verb: trephine - trephined - trephined

Affirmation

Simple form

I could trephine
you could trephine
he could trephine
we could trephine
you could trephine
they could trephine

V-ing form

I could be trephining
you could be trephining
he could be trephining
we could be trephining
you could be trephining
they could be trephining

Perfect

I could have trephined
you could have trephined
he could have trephined
we could have trephined
you could have trephined
they could have trephined

V-ing perfect

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

Negation

Simple form

I could not trephine
you could not trephine
he could not trephine
we could not trephine
you could not trephine
they could not trephine

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I trephine?
could you trephine?
could he trephine?
could we trephine?
could you trephine?
could they trephine?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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