should prick
Regular verb: prick - pricked- pricked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd prick
you'd prick
he'd prick
we'd prick
you'd prick
they'd prick 	I'd be pricking
you'd be pricking
he'd be pricking
we'd be pricking
you'd be pricking
they'd be pricking	I should've pricked
you should've pricked
he should've pricked
we should've pricked
you should've pricked
they should've pricked	I should've been pricking
you should've been pricking
he should've been pricking
we should've been pricking
you should've been pricking
they should've been pricking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't prick
you shouldn't prick
he shouldn't prick
we shouldn't prick
you shouldn't prick
they shouldn't prick 	I shouldn't be pricking
you shouldn't be pricking
he shouldn't be pricking
we shouldn't be pricking
you shouldn't be pricking
they shouldn't be pricking	I shouldn't have pricked
you shouldn't have pricked
he shouldn't have pricked
we shouldn't have pricked
you shouldn't have pricked
they shouldn't have pricked	I shouldn't have been pricking
you shouldn't have been pricking
he shouldn't have been pricking
we shouldn't have been pricking
you shouldn't have been pricking
they shouldn't have been pricking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I prick?
should you prick?
should he prick?
should we prick?
should you prick?
should they prick? 	should I be pricking?
should you be pricking?
should he be pricking?
should we be pricking?
should you be pricking?
should they be pricking? 	should I have pricked?
should you have pricked?
should he have pricked?
should we have pricked?
should you have pricked?
should they have pricked? 	should I have been pricking?
should you have been pricking?
should he have been pricking?
should we have been pricking?
should you have been pricking?
should they have been pricking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I prick?
shouldn't you prick?
shouldn't he prick?
shouldn't we prick?
shouldn't you prick?
shouldn't they prick? 	shouldn't I be pricking?
shouldn't you be pricking?
shouldn't he be pricking?
shouldn't we be pricking?
shouldn't you be pricking?
shouldn't they be pricking? 	shouldn't I have pricked?
shouldn't you have pricked?
shouldn't he have pricked?
shouldn't we have pricked?
shouldn't you have pricked?
shouldn't they have pricked? 	shouldn't I have been pricking?
shouldn't you have been pricking?
shouldn't he have been pricking?
shouldn't we have been pricking?
shouldn't you have been pricking?
shouldn't they have been pricking?