should puff
Regular verb: puff - puffed- puffed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd puff
you'd puff
she'd puff
we'd puff
you'd puff
they'd puff 	I'd be puffing
you'd be puffing
she'd be puffing
we'd be puffing
you'd be puffing
they'd be puffing	I should've puffed
you should've puffed
she should've puffed
we should've puffed
you should've puffed
they should've puffed	I should've been puffing
you should've been puffing
she should've been puffing
we should've been puffing
you should've been puffing
they should've been puffing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't puff
you shouldn't puff
she shouldn't puff
we shouldn't puff
you shouldn't puff
they shouldn't puff 	I shouldn't be puffing
you shouldn't be puffing
she shouldn't be puffing
we shouldn't be puffing
you shouldn't be puffing
they shouldn't be puffing	I shouldn't have puffed
you shouldn't have puffed
she shouldn't have puffed
we shouldn't have puffed
you shouldn't have puffed
they shouldn't have puffed	I shouldn't have been puffing
you shouldn't have been puffing
she shouldn't have been puffing
we shouldn't have been puffing
you shouldn't have been puffing
they shouldn't have been puffing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I puff?
should you puff?
should she puff?
should we puff?
should you puff?
should they puff? 	should I be puffing?
should you be puffing?
should she be puffing?
should we be puffing?
should you be puffing?
should they be puffing? 	should I have puffed?
should you have puffed?
should she 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 she 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 	
shouldn't I puff?
shouldn't you puff?
shouldn't she puff?
shouldn't we puff?
shouldn't you puff?
shouldn't they puff? 	shouldn't I be puffing?
shouldn't you be puffing?
shouldn't she be puffing?
shouldn't we be puffing?
shouldn't you be puffing?
shouldn't they be puffing? 	shouldn't I have puffed?
shouldn't you have puffed?
shouldn't she have puffed?
shouldn't we have puffed?
shouldn't you have puffed?
shouldn't they have puffed? 	shouldn't I have been puffing?
shouldn't you have been puffing?
shouldn't she have been puffing?
shouldn't we have been puffing?
shouldn't you have been puffing?
shouldn't they have been puffing?