could kern
Verbo regular: kern - kerned- kerned

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could kern
you could kern
he could kern
we could kern
you could kern
they could kern 	I could be kerning
you could be kerning
he could be kerning
we could be kerning
you could be kerning
they could be kerning	I could have kerned
you could have kerned
he could have kerned
we could have kerned
you could have kerned
they could have kerned	I could have been kerning
you could have been kerning
he could have been kerning
we could have been kerning
you could have been kerning
they could have been kerning	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not kern
you could not kern
he could not kern
we could not kern
you could not kern
they could not kern 	I could not be kerning
you could not be kerning
he could not be kerning
we could not be kerning
you could not be kerning
they could not be kerning	I could not have kerned
you could not have kerned
he could not have kerned
we could not have kerned
you could not have kerned
they could not have kerned	I could not have been kerning
you could not have been kerning
he could not have been kerning
we could not have been kerning
you could not have been kerning
they could not have been kerning	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I kern?
could you kern?
could he kern?
could we kern?
could you kern?
could they kern? 	could I be kerning?
could you be kerning?
could he be kerning?
could we be kerning?
could you be kerning?
could they be kerning? 	could I have kerned?
could you have kerned?
could he have kerned?
could we have kerned?
could you have kerned?
could they have kerned? 	could I have been kerning?
could you have been kerning?
could he have been kerning?
could we have been kerning?
could you have been kerning?
could they have been kerning? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not kern?
could you not kern?
could he not kern?
could we not kern?
could you not kern?
could they not kern? 	could I not be kerning?
could you not be kerning?
could he not be kerning?
could we not be kerning?
could you not be kerning?
could they not be kerning? 	could I not have kerned?
could you not have kerned?
could he not have kerned?
could we not have kerned?
could you not have kerned?
could they not have kerned? 	could I not have been kerning?
could you not have been kerning?
could he not have been kerning?
could we not have been kerning?
could you not have been kerning?
could they not have been kerning?