could stalemate
Verbo regular: stalemate - stalemated- stalemated

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could stalemate
you could stalemate
he could stalemate
we could stalemate
you could stalemate
they could stalemate 	I could be stalemating
you could be stalemating
he could be stalemating
we could be stalemating
you could be stalemating
they could be stalemating	I could have stalemated
you could have stalemated
he could have stalemated
we could have stalemated
you could have stalemated
they could have stalemated	I could have been stalemating
you could have been stalemating
he could have been stalemating
we could have been stalemating
you could have been stalemating
they could have been stalemating	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not stalemate
you could not stalemate
he could not stalemate
we could not stalemate
you could not stalemate
they could not stalemate 	I could not be stalemating
you could not be stalemating
he could not be stalemating
we could not be stalemating
you could not be stalemating
they could not be stalemating	I could not have stalemated
you could not have stalemated
he could not have stalemated
we could not have stalemated
you could not have stalemated
they could not have stalemated	I could not have been stalemating
you could not have been stalemating
he could not have been stalemating
we could not have been stalemating
you could not have been stalemating
they could not have been stalemating	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I stalemate?
could you stalemate?
could he stalemate?
could we stalemate?
could you stalemate?
could they stalemate? 	could I be stalemating?
could you be stalemating?
could he be stalemating?
could we be stalemating?
could you be stalemating?
could they be stalemating? 	could I have stalemated?
could you have stalemated?
could he have stalemated?
could we have stalemated?
could you have stalemated?
could they have stalemated? 	could I have been stalemating?
could you have been stalemating?
could he have been stalemating?
could we have been stalemating?
could you have been stalemating?
could they have been stalemating? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not stalemate?
could you not stalemate?
could he not stalemate?
could we not stalemate?
could you not stalemate?
could they not stalemate? 	could I not be stalemating?
could you not be stalemating?
could he not be stalemating?
could we not be stalemating?
could you not be stalemating?
could they not be stalemating? 	could I not have stalemated?
could you not have stalemated?
could he not have stalemated?
could we not have stalemated?
could you not have stalemated?
could they not have stalemated? 	could I not have been stalemating?
could you not have been stalemating?
could he not have been stalemating?
could we not have been stalemating?
could you not have been stalemating?
could they not have been stalemating?