English verb conjugation
CAN BILLOW

Regular verb: billow - billowed - billowed

Affirmation

Simple form	V-ing form
I can billow you can billow he can billow we can billow you can billow they can billow	I can be billowing you can be billowing he can be billowing we can be billowing you can be billowing they can be billowing
Perfect	V-ing perfect
I can have billowed you can have billowed he can have billowed we can have billowed you can have billowed they can have billowed	I can have been billowing you can have been billowing he can have been billowing we can have been billowing you can have been billowing they can have been billowing

Negation

Simple form	V-ing form
I can't billow you can't billow he can't billow we can't billow you can't billow they can't billow	I can't be billowing you can't be billowing he can't be billowing we can't be billowing you can't be billowing they can't be billowing
Perfect	V-ing perfect
I can't have billowed you can't have billowed he can't have billowed we can't have billowed you can't have billowed they can't have billowed	I can't have been billowing you can't have been billowing he can't have been billowing we can't have been billowing you can't have been billowing they can't have been billowing

Interrogative form

Simple form	V-ing form
can I billow? can you billow? can he billow? can we billow? can you billow? can they billow?	can I be billowing? can you be billowing? can he be billowing? can we be billowing? can you be billowing? can they be billowing?
Perfect	V-ing perfect
can I have billowed? can you have billowed? can he have billowed? can we have billowed? can you have billowed? can they have billowed?	can I have been billowing? can you have been billowing? can he have been billowing? can we have been billowing? can you have been billowing? can they have been billowing?

Interro-negative form

Simple form	V-ing form
can't I billow? can't you billow? can't he billow? can't we billow? can't you billow? can't they billow?	can't I be billowing? can't you be billowing? can't he be billowing? can't we be billowing? can't you be billowing? can't they be billowing?
Perfect	V-ing perfect
can't I have billowed? can't you have billowed? can't he have billowed? can't we have billowed? can't you have billowed? can't they have billowed?	can't I have been billowing? can't you have been billowing? can't he have been billowing? can't we have been billowing? can't you have been billowing? can't they have been billowing?