could prink
Regular verb: prink - prinked- prinked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could prink
you could prink
she could prink
we could prink
you could prink
they could prink 	I could be prinking
you could be prinking
she could be prinking
we could be prinking
you could be prinking
they could be prinking	I could have prinked
you could have prinked
she could have prinked
we could have prinked
you could have prinked
they could have prinked	I could have been prinking
you could have been prinking
she could have been prinking
we could have been prinking
you could have been prinking
they could have been prinking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't prink
you couldn't prink
she couldn't prink
we couldn't prink
you couldn't prink
they couldn't prink 	I couldn't be prinking
you couldn't be prinking
she couldn't be prinking
we couldn't be prinking
you couldn't be prinking
they couldn't be prinking	I couldn't have prinked
you couldn't have prinked
she couldn't have prinked
we couldn't have prinked
you couldn't have prinked
they couldn't have prinked	I couldn't have been prinking
you couldn't have been prinking
she couldn't have been prinking
we couldn't have been prinking
you couldn't have been prinking
they couldn't have been prinking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I prink?
could you prink?
could she prink?
could we prink?
could you prink?
could they prink? 	could I be prinking?
could you be prinking?
could she be prinking?
could we be prinking?
could you be prinking?
could they be prinking? 	could I have prinked?
could you have prinked?
could she have prinked?
could we have prinked?
could you have prinked?
could they have prinked? 	could I have been prinking?
could you have been prinking?
could she have been prinking?
could we have been prinking?
could you have been prinking?
could they have been prinking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I prink?
couldn't you prink?
couldn't she prink?
couldn't we prink?
couldn't you prink?
couldn't they prink? 	couldn't I be prinking?
couldn't you be prinking?
couldn't she be prinking?
couldn't we be prinking?
couldn't you be prinking?
couldn't they be prinking? 	couldn't I have prinked?
couldn't you have prinked?
couldn't she have prinked?
couldn't we have prinked?
couldn't you have prinked?
couldn't they have prinked? 	couldn't I have been prinking?
couldn't you have been prinking?
couldn't she have been prinking?
couldn't we have been prinking?
couldn't you have been prinking?
couldn't they have been prinking?