English verb conjugation COULD BILLOW

Regular verb: billow - billowed - billowed

Affirmation

Simple form

I could billow
you could billow
he could billow
we could billow
you could billow
they could billow

V-ing form

I could be billowing
you could be billowing
he could be billowing
we could be billowing
you could be billowing
they could be billowing

Perfect

I could have billowed
you could have billowed
he could have billowed
we could have billowed
you could have billowed
they could have billowed

V-ing perfect

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

Negation

Simple form

I could not billow
you could not billow
he could not billow
we could not billow
you could not billow
they could not billow

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I billow?
could you billow?
could he billow?
could we billow?
could you billow?
could they billow?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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