could bias
Verbo regular: bias - biased- biased

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could bias
you could bias
he could bias
we could bias
you could bias
they could bias 	I could be biasing
you could be biasing
he could be biasing
we could be biasing
you could be biasing
they could be biasing	I could have biased
you could have biased
he could have biased
we could have biased
you could have biased
they could have biased	I could have been biasing
you could have been biasing
he could have been biasing
we could have been biasing
you could have been biasing
they could have been biasing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't bias
you couldn't bias
he couldn't bias
we couldn't bias
you couldn't bias
they couldn't bias 	I couldn't be biasing
you couldn't be biasing
he couldn't be biasing
we couldn't be biasing
you couldn't be biasing
they couldn't be biasing	I couldn't have biased
you couldn't have biased
he couldn't have biased
we couldn't have biased
you couldn't have biased
they couldn't have biased	I couldn't have been biasing
you couldn't have been biasing
he couldn't have been biasing
we couldn't have been biasing
you couldn't have been biasing
they couldn't have been biasing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I bias?
could you bias?
could he bias?
could we bias?
could you bias?
could they bias? 	could I be biasing?
could you be biasing?
could he be biasing?
could we be biasing?
could you be biasing?
could they be biasing? 	could I have biased?
could you have biased?
could he have biased?
could we have biased?
could you have biased?
could they have biased? 	could I have been biasing?
could you have been biasing?
could he have been biasing?
could we have been biasing?
could you have been biasing?
could they have been biasing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I bias?
couldn't you bias?
couldn't he bias?
couldn't we bias?
couldn't you bias?
couldn't they bias? 	couldn't I be biasing?
couldn't you be biasing?
couldn't he be biasing?
couldn't we be biasing?
couldn't you be biasing?
couldn't they be biasing? 	couldn't I have biased?
couldn't you have biased?
couldn't he have biased?
couldn't we have biased?
couldn't you have biased?
couldn't they have biased? 	couldn't I have been biasing?
couldn't you have been biasing?
couldn't he have been biasing?
couldn't we have been biasing?
couldn't you have been biasing?
couldn't they have been biasing?