could perk perk
Regular verb: perk perk - perk perked- perk perked

, this verb may not exist. Conjugation is given as example.

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could perk perk
you could perk perk
she could perk perk
we could perk perk
you could perk perk
they could perk perk 	I could be perk perking
you could be perk perking
she could be perk perking
we could be perk perking
you could be perk perking
they could be perk perking	I could have perk perked
you could have perk perked
she could have perk perked
we could have perk perked
you could have perk perked
they could have perk perked	I could have been perk perking
you could have been perk perking
she could have been perk perking
we could have been perk perking
you could have been perk perking
they could have been perk perking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't perk perk
you couldn't perk perk
she couldn't perk perk
we couldn't perk perk
you couldn't perk perk
they couldn't perk perk 	I couldn't be perk perking
you couldn't be perk perking
she couldn't be perk perking
we couldn't be perk perking
you couldn't be perk perking
they couldn't be perk perking	I couldn't have perk perked
you couldn't have perk perked
she couldn't have perk perked
we couldn't have perk perked
you couldn't have perk perked
they couldn't have perk perked	I couldn't have been perk perking
you couldn't have been perk perking
she couldn't have been perk perking
we couldn't have been perk perking
you couldn't have been perk perking
they couldn't have been perk perking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I perk perk?
could you perk perk?
could she perk perk?
could we perk perk?
could you perk perk?
could they perk perk? 	could I be perk perking?
could you be perk perking?
could she be perk perking?
could we be perk perking?
could you be perk perking?
could they be perk perking? 	could I have perk perked?
could you have perk perked?
could she have perk perked?
could we have perk perked?
could you have perk perked?
could they have perk perked? 	could I have been perk perking?
could you have been perk perking?
could she have been perk perking?
could we have been perk perking?
could you have been perk perking?
could they have been perk perking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I perk perk?
couldn't you perk perk?
couldn't she perk perk?
couldn't we perk perk?
couldn't you perk perk?
couldn't they perk perk? 	couldn't I be perk perking?
couldn't you be perk perking?
couldn't she be perk perking?
couldn't we be perk perking?
couldn't you be perk perking?
couldn't they be perk perking? 	couldn't I have perk perked?
couldn't you have perk perked?
couldn't she have perk perked?
couldn't we have perk perked?
couldn't you have perk perked?
couldn't they have perk perked? 	couldn't I have been perk perking?
couldn't you have been perk perking?
couldn't she have been perk perking?
couldn't we have been perk perking?
couldn't you have been perk perking?
couldn't they have been perk perking?