can perk
Regular verb: perk - perked- perked

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

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

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

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