can grok
Verbo regular: grok - groked- groked

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can grok
you can grok
he can grok
we can grok
you can grok
they can grok 	I can be groking
you can be groking
he can be groking
we can be groking
you can be groking
they can be groking	I can have groked
you can have groked
he can have groked
we can have groked
you can have groked
they can have groked	I can have been groking
you can have been groking
he can have been groking
we can have been groking
you can have been groking
they can have been groking	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I cannot grok
you cannot grok
he cannot grok
we cannot grok
you cannot grok
they cannot grok 	I cannot be groking
you cannot be groking
he cannot be groking
we cannot be groking
you cannot be groking
they cannot be groking	I cannot have groked
you cannot have groked
he cannot have groked
we cannot have groked
you cannot have groked
they cannot have groked	I cannot have been groking
you cannot have been groking
he cannot have been groking
we cannot have been groking
you cannot have been groking
they cannot have been groking	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I grok?
can you grok?
can he grok?
can we grok?
can you grok?
can they grok? 	can I be groking?
can you be groking?
can he be groking?
can we be groking?
can you be groking?
can they be groking? 	can I have groked?
can you have groked?
can he have groked?
can we have groked?
can you have groked?
can they have groked? 	can I have been groking?
can you have been groking?
can he have been groking?
can we have been groking?
can you have been groking?
can they have been groking? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I not grok?
can you not grok?
can he not grok?
can we not grok?
can you not grok?
can they not grok? 	can I not be groking?
can you not be groking?
can he not be groking?
can we not be groking?
can you not be groking?
can they not be groking? 	can I not have groked?
can you not have groked?
can he not have groked?
can we not have groked?
can you not have groked?
can they not have groked? 	can I not have been groking?
can you not have been groking?
can he not have been groking?
can we not have been groking?
can you not have been groking?
can they not have been groking?