should puff
Regular verb: puff - puffed- puffed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should puff
you should puff
he should puff
we should puff
you should puff
they should puff 	I should be puffing
you should be puffing
he should be puffing
we should be puffing
you should be puffing
they should be puffing	I should have puffed
you should have puffed
he should have puffed
we should have puffed
you should have puffed
they should have puffed	I should have been puffing
you should have been puffing
he should have been puffing
we should have been puffing
you should have been puffing
they should have been puffing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should not puff
you should not puff
he should not puff
we should not puff
you should not puff
they should not puff 	I should not be puffing
you should not be puffing
he should not be puffing
we should not be puffing
you should not be puffing
they should not be puffing	I should not have puffed
you should not have puffed
he should not have puffed
we should not have puffed
you should not have puffed
they should not have puffed	I should not have been puffing
you should not have been puffing
he should not have been puffing
we should not have been puffing
you should not have been puffing
they should not have been puffing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I puff?
should you puff?
should he puff?
should we puff?
should you puff?
should they puff? 	should I be puffing?
should you be puffing?
should he be puffing?
should we be puffing?
should you be puffing?
should they be puffing? 	should I have puffed?
should you have puffed?
should he have puffed?
should we have puffed?
should you have puffed?
should they have puffed? 	should I have been puffing?
should you have been puffing?
should he have been puffing?
should we have been puffing?
should you have been puffing?
should they have been puffing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I not puff?
should you not puff?
should he not puff?
should we not puff?
should you not puff?
should they not puff? 	should I not be puffing?
should you not be puffing?
should he not be puffing?
should we not be puffing?
should you not be puffing?
should they not be puffing? 	should I not have puffed?
should you not have puffed?
should he not have puffed?
should we not have puffed?
should you not have puffed?
should they not have puffed? 	should I not have been puffing?
should you not have been puffing?
should he not have been puffing?
should we not have been puffing?
should you not have been puffing?
should they not have been puffing?