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 couldn't billow
you couldn't billow
he couldn't billow
we couldn't billow
you couldn't billow
they couldn't billow

V-ing form

I couldn't be billowing
you couldn't be billowing
he couldn't be billowing
we couldn't be billowing
you couldn't be billowing
they couldn't be billowing

Perfect

I couldn't have billowed
you couldn't have billowed
he couldn't have billowed
we couldn't have billowed
you couldn't have billowed
they couldn't have billowed

V-ing perfect

I couldn't have been billowing
you couldn't have been billowing
he couldn't have been billowing
we couldn't have been billowing
you couldn't have been billowing
they couldn't 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

couldn't I billow?
couldn't you billow?
couldn't he billow?
couldn't we billow?
couldn't you billow?
couldn't they billow?

V-ing form

couldn't I be billowing?
couldn't you be billowing?
couldn't he be billowing?
couldn't we be billowing?
couldn't you be billowing?
couldn't they be billowing?

Perfect

couldn't I have billowed?
couldn't you have billowed?
couldn't he have billowed?
couldn't we have billowed?
couldn't you have billowed?
couldn't they have billowed?

V-ing perfect

couldn't I have been billowing?
couldn't you have been billowing?
couldn't he have been billowing?
couldn't we have been billowing?
couldn't you have been billowing?
couldn't they have been billowing?

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