should whiff
Regular verb: whiff - whiffed- whiffed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd whiff
you'd whiff
he'd whiff
we'd whiff
you'd whiff
they'd whiff 	I'd be whiffing
you'd be whiffing
he'd be whiffing
we'd be whiffing
you'd be whiffing
they'd be whiffing	I should've whiffed
you should've whiffed
he should've whiffed
we should've whiffed
you should've whiffed
they should've whiffed	I should've been whiffing
you should've been whiffing
he should've been whiffing
we should've been whiffing
you should've been whiffing
they should've been whiffing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't whiff
you shouldn't whiff
he shouldn't whiff
we shouldn't whiff
you shouldn't whiff
they shouldn't whiff 	I shouldn't be whiffing
you shouldn't be whiffing
he shouldn't be whiffing
we shouldn't be whiffing
you shouldn't be whiffing
they shouldn't be whiffing	I shouldn't have whiffed
you shouldn't have whiffed
he shouldn't have whiffed
we shouldn't have whiffed
you shouldn't have whiffed
they shouldn't have whiffed	I shouldn't have been whiffing
you shouldn't have been whiffing
he shouldn't have been whiffing
we shouldn't have been whiffing
you shouldn't have been whiffing
they shouldn't have been whiffing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I whiff?
should you whiff?
should he whiff?
should we whiff?
should you whiff?
should they whiff? 	should I be whiffing?
should you be whiffing?
should he be whiffing?
should we be whiffing?
should you be whiffing?
should they be whiffing? 	should I have whiffed?
should you have whiffed?
should he have whiffed?
should we have whiffed?
should you have whiffed?
should they have whiffed? 	should I have been whiffing?
should you have been whiffing?
should he have been whiffing?
should we have been whiffing?
should you have been whiffing?
should they have been whiffing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I whiff?
shouldn't you whiff?
shouldn't he whiff?
shouldn't we whiff?
shouldn't you whiff?
shouldn't they whiff? 	shouldn't I be whiffing?
shouldn't you be whiffing?
shouldn't he be whiffing?
shouldn't we be whiffing?
shouldn't you be whiffing?
shouldn't they be whiffing? 	shouldn't I have whiffed?
shouldn't you have whiffed?
shouldn't he have whiffed?
shouldn't we have whiffed?
shouldn't you have whiffed?
shouldn't they have whiffed? 	shouldn't I have been whiffing?
shouldn't you have been whiffing?
shouldn't he have been whiffing?
shouldn't we have been whiffing?
shouldn't you have been whiffing?
shouldn't they have been whiffing?