can prick
Regular verb: prick - pricked- pricked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can prick
you can prick
he can prick
we can prick
you can prick
they can prick 	I can be pricking
you can be pricking
he can be pricking
we can be pricking
you can be pricking
they can be pricking	I can have pricked
you can have pricked
he can have pricked
we can have pricked
you can have pricked
they can have pricked	I can have been pricking
you can have been pricking
he can have been pricking
we can have been pricking
you can have been pricking
they can have been pricking	

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

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

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