could yield
Verbo regular: yield - yielded- yielded

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could yield
you could yield
she could yield
we could yield
you could yield
they could yield 	I could be yielding
you could be yielding
she could be yielding
we could be yielding
you could be yielding
they could be yielding	I could have yielded
you could have yielded
she could have yielded
we could have yielded
you could have yielded
they could have yielded	I could have been yielding
you could have been yielding
she could have been yielding
we could have been yielding
you could have been yielding
they could have been yielding	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not yield
you could not yield
she could not yield
we could not yield
you could not yield
they could not yield 	I could not be yielding
you could not be yielding
she could not be yielding
we could not be yielding
you could not be yielding
they could not be yielding	I could not have yielded
you could not have yielded
she could not have yielded
we could not have yielded
you could not have yielded
they could not have yielded	I could not have been yielding
you could not have been yielding
she could not have been yielding
we could not have been yielding
you could not have been yielding
they could not have been yielding	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I yield?
could you yield?
could she yield?
could we yield?
could you yield?
could they yield? 	could I be yielding?
could you be yielding?
could she be yielding?
could we be yielding?
could you be yielding?
could they be yielding? 	could I have yielded?
could you have yielded?
could she have yielded?
could we have yielded?
could you have yielded?
could they have yielded? 	could I have been yielding?
could you have been yielding?
could she have been yielding?
could we have been yielding?
could you have been yielding?
could they have been yielding? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not yield?
could you not yield?
could she not yield?
could we not yield?
could you not yield?
could they not yield? 	could I not be yielding?
could you not be yielding?
could she not be yielding?
could we not be yielding?
could you not be yielding?
could they not be yielding? 	could I not have yielded?
could you not have yielded?
could she not have yielded?
could we not have yielded?
could you not have yielded?
could they not have yielded? 	could I not have been yielding?
could you not have been yielding?
could she not have been yielding?
could we not have been yielding?
could you not have been yielding?
could they not have been yielding?