should winnow
Regular verb: winnow - winnowed- winnowed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd winnow
you'd winnow
he'd winnow
we'd winnow
you'd winnow
they'd winnow 	I'd be winnowing
you'd be winnowing
he'd be winnowing
we'd be winnowing
you'd be winnowing
they'd be winnowing	I should've winnowed
you should've winnowed
he should've winnowed
we should've winnowed
you should've winnowed
they should've winnowed	I should've been winnowing
you should've been winnowing
he should've been winnowing
we should've been winnowing
you should've been winnowing
they should've been winnowing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't winnow
you shouldn't winnow
he shouldn't winnow
we shouldn't winnow
you shouldn't winnow
they shouldn't winnow 	I shouldn't be winnowing
you shouldn't be winnowing
he shouldn't be winnowing
we shouldn't be winnowing
you shouldn't be winnowing
they shouldn't be winnowing	I shouldn't have winnowed
you shouldn't have winnowed
he shouldn't have winnowed
we shouldn't have winnowed
you shouldn't have winnowed
they shouldn't have winnowed	I shouldn't have been winnowing
you shouldn't have been winnowing
he shouldn't have been winnowing
we shouldn't have been winnowing
you shouldn't have been winnowing
they shouldn't have been winnowing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I winnow?
should you winnow?
should he winnow?
should we winnow?
should you winnow?
should they winnow? 	should I be winnowing?
should you be winnowing?
should he be winnowing?
should we be winnowing?
should you be winnowing?
should they be winnowing? 	should I have winnowed?
should you have winnowed?
should he have winnowed?
should we have winnowed?
should you have winnowed?
should they have winnowed? 	should I have been winnowing?
should you have been winnowing?
should he have been winnowing?
should we have been winnowing?
should you have been winnowing?
should they have been winnowing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I winnow?
shouldn't you winnow?
shouldn't he winnow?
shouldn't we winnow?
shouldn't you winnow?
shouldn't they winnow? 	shouldn't I be winnowing?
shouldn't you be winnowing?
shouldn't he be winnowing?
shouldn't we be winnowing?
shouldn't you be winnowing?
shouldn't they be winnowing? 	shouldn't I have winnowed?
shouldn't you have winnowed?
shouldn't he have winnowed?
shouldn't we have winnowed?
shouldn't you have winnowed?
shouldn't they have winnowed? 	shouldn't I have been winnowing?
shouldn't you have been winnowing?
shouldn't he have been winnowing?
shouldn't we have been winnowing?
shouldn't you have been winnowing?
shouldn't they have been winnowing?