could sour
Verbo regular: sour - soured- soured

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could sour
you could sour
she could sour
we could sour
you could sour
they could sour 	I could be souring
you could be souring
she could be souring
we could be souring
you could be souring
they could be souring	I could have soured
you could have soured
she could have soured
we could have soured
you could have soured
they could have soured	I could have been souring
you could have been souring
she could have been souring
we could have been souring
you could have been souring
they could have been souring	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not sour
you could not sour
she could not sour
we could not sour
you could not sour
they could not sour 	I could not be souring
you could not be souring
she could not be souring
we could not be souring
you could not be souring
they could not be souring	I could not have soured
you could not have soured
she could not have soured
we could not have soured
you could not have soured
they could not have soured	I could not have been souring
you could not have been souring
she could not have been souring
we could not have been souring
you could not have been souring
they could not have been souring	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I sour?
could you sour?
could she sour?
could we sour?
could you sour?
could they sour? 	could I be souring?
could you be souring?
could she be souring?
could we be souring?
could you be souring?
could they be souring? 	could I have soured?
could you have soured?
could she have soured?
could we have soured?
could you have soured?
could they have soured? 	could I have been souring?
could you have been souring?
could she have been souring?
could we have been souring?
could you have been souring?
could they have been souring? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not sour?
could you not sour?
could she not sour?
could we not sour?
could you not sour?
could they not sour? 	could I not be souring?
could you not be souring?
could she not be souring?
could we not be souring?
could you not be souring?
could they not be souring? 	could I not have soured?
could you not have soured?
could she not have soured?
could we not have soured?
could you not have soured?
could they not have soured? 	could I not have been souring?
could you not have been souring?
could she not have been souring?
could we not have been souring?
could you not have been souring?
could they not have been souring?