can perk
Verbo regular: perk - perked- perked

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
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	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I cannot perk
you cannot perk
she cannot perk
we cannot perk
you cannot perk
they cannot perk 	I cannot be perking
you cannot be perking
she cannot be perking
we cannot be perking
you cannot be perking
they cannot be perking	I cannot have perked
you cannot have perked
she cannot have perked
we cannot have perked
you cannot have perked
they cannot have perked	I cannot have been perking
you cannot have been perking
she cannot have been perking
we cannot have been perking
you cannot have been perking
they cannot have been perking	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
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? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I not perk?
can you not perk?
can she not perk?
can we not perk?
can you not perk?
can they not perk? 	can I not be perking?
can you not be perking?
can she not be perking?
can we not be perking?
can you not be perking?
can they not be perking? 	can I not have perked?
can you not have perked?
can she not have perked?
can we not have perked?
can you not have perked?
can they not have perked? 	can I not have been perking?
can you not have been perking?
can she not have been perking?
can we not have been perking?
can you not have been perking?
can they not have been perking?