English verb conjugation COULD LEAVEN

Regular verb: leaven - leavened - leavened

Affirmation

Simple form

I could leaven
you could leaven
he could leaven
we could leaven
you could leaven
they could leaven

V-ing form

I could be leavening
you could be leavening
he could be leavening
we could be leavening
you could be leavening
they could be leavening

Perfect

I could have leavened
you could have leavened
he could have leavened
we could have leavened
you could have leavened
they could have leavened

V-ing perfect

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

Negation

Simple form

I could not leaven
you could not leaven
he could not leaven
we could not leaven
you could not leaven
they could not leaven

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I leaven?
could you leaven?
could he leaven?
could we leaven?
could you leaven?
could they leaven?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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