English verb conjugation COULD HAVEN

Regular verb: haven - havened - havened

Affirmation

Simple form

I could haven
you could haven
he could haven
we could haven
you could haven
they could haven

V-ing form

I could be havening
you could be havening
he could be havening
we could be havening
you could be havening
they could be havening

Perfect

I could have havened
you could have havened
he could have havened
we could have havened
you could have havened
they could have havened

V-ing perfect

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

Negation

Simple form

I could not haven
you could not haven
he could not haven
we could not haven
you could not haven
they could not haven

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I haven?
could you haven?
could he haven?
could we haven?
could you haven?
could they haven?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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