should billow
Regular verb: billow - billowed- billowed

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

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should not billow
you should not billow
he should not billow
we should not billow
you should not billow
they should not billow 	I should not be billowing
you should not be billowing
he should not be billowing
we should not be billowing
you should not be billowing
they should not be billowing	I should not have billowed
you should not have billowed
he should not have billowed
we should not have billowed
you should not have billowed
they should not have billowed	I should not have been billowing
you should not have been billowing
he should not have been billowing
we should not have been billowing
you should not have been billowing
they should not have been billowing	

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

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I not billow?
should you not billow?
should he not billow?
should we not billow?
should you not billow?
should they not billow? 	should I not be billowing?
should you not be billowing?
should he not be billowing?
should we not be billowing?
should you not be billowing?
should they not be billowing? 	should I not have billowed?
should you not have billowed?
should he not have billowed?
should we not have billowed?
should you not have billowed?
should they not have billowed? 	should I not have been billowing?
should you not have been billowing?
should he not have been billowing?
should we not have been billowing?
should you not have been billowing?
should they not have been billowing?