could define
Verbo regular: define - defined- defined

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could define
you could define
she could define
we could define
you could define
they could define 	I could be defining
you could be defining
she could be defining
we could be defining
you could be defining
they could be defining	I could have defined
you could have defined
she could have defined
we could have defined
you could have defined
they could have defined	I could have been defining
you could have been defining
she could have been defining
we could have been defining
you could have been defining
they could have been defining	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not define
you could not define
she could not define
we could not define
you could not define
they could not define 	I could not be defining
you could not be defining
she could not be defining
we could not be defining
you could not be defining
they could not be defining	I could not have defined
you could not have defined
she could not have defined
we could not have defined
you could not have defined
they could not have defined	I could not have been defining
you could not have been defining
she could not have been defining
we could not have been defining
you could not have been defining
they could not have been defining	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I define?
could you define?
could she define?
could we define?
could you define?
could they define? 	could I be defining?
could you be defining?
could she be defining?
could we be defining?
could you be defining?
could they be defining? 	could I have defined?
could you have defined?
could she have defined?
could we have defined?
could you have defined?
could they have defined? 	could I have been defining?
could you have been defining?
could she have been defining?
could we have been defining?
could you have been defining?
could they have been defining? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not define?
could you not define?
could she not define?
could we not define?
could you not define?
could they not define? 	could I not be defining?
could you not be defining?
could she not be defining?
could we not be defining?
could you not be defining?
could they not be defining? 	could I not have defined?
could you not have defined?
could she not have defined?
could we not have defined?
could you not have defined?
could they not have defined? 	could I not have been defining?
could you not have been defining?
could she not have been defining?
could we not have been defining?
could you not have been defining?
could they not have been defining?