could prick
Verbo regular: prick - pricked- pricked

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could prick
you could prick
she could prick
we could prick
you could prick
they could prick 	I could be pricking
you could be pricking
she could be pricking
we could be pricking
you could be pricking
they could be pricking	I could have pricked
you could have pricked
she could have pricked
we could have pricked
you could have pricked
they could have pricked	I could have been pricking
you could have been pricking
she could have been pricking
we could have been pricking
you could have been pricking
they could have been pricking	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't prick
you couldn't prick
she couldn't prick
we couldn't prick
you couldn't prick
they couldn't prick 	I couldn't be pricking
you couldn't be pricking
she couldn't be pricking
we couldn't be pricking
you couldn't be pricking
they couldn't be pricking	I couldn't have pricked
you couldn't have pricked
she couldn't have pricked
we couldn't have pricked
you couldn't have pricked
they couldn't have pricked	I couldn't have been pricking
you couldn't have been pricking
she couldn't have been pricking
we couldn't have been pricking
you couldn't have been pricking
they couldn't have been pricking	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I prick?
could you prick?
could she prick?
could we prick?
could you prick?
could they prick? 	could I be pricking?
could you be pricking?
could she be pricking?
could we be pricking?
could you be pricking?
could they be pricking? 	could I have pricked?
could you have pricked?
could she have pricked?
could we have pricked?
could you have pricked?
could they have pricked? 	could I have been pricking?
could you have been pricking?
could she have been pricking?
could we have been pricking?
could you have been pricking?
could they have been pricking? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I prick?
couldn't you prick?
couldn't she prick?
couldn't we prick?
couldn't you prick?
couldn't they prick? 	couldn't I be pricking?
couldn't you be pricking?
couldn't she be pricking?
couldn't we be pricking?
couldn't you be pricking?
couldn't they be pricking? 	couldn't I have pricked?
couldn't you have pricked?
couldn't she have pricked?
couldn't we have pricked?
couldn't you have pricked?
couldn't they have pricked? 	couldn't I have been pricking?
couldn't you have been pricking?
couldn't she have been pricking?
couldn't we have been pricking?
couldn't you have been pricking?
couldn't they have been pricking?