could warble
Verbo regular: warble - warbled- warbled

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could warble
you could warble
she could warble
we could warble
you could warble
they could warble 	I could be warbling
you could be warbling
she could be warbling
we could be warbling
you could be warbling
they could be warbling	I could have warbled
you could have warbled
she could have warbled
we could have warbled
you could have warbled
they could have warbled	I could have been warbling
you could have been warbling
she could have been warbling
we could have been warbling
you could have been warbling
they could have been warbling	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not warble
you could not warble
she could not warble
we could not warble
you could not warble
they could not warble 	I could not be warbling
you could not be warbling
she could not be warbling
we could not be warbling
you could not be warbling
they could not be warbling	I could not have warbled
you could not have warbled
she could not have warbled
we could not have warbled
you could not have warbled
they could not have warbled	I could not have been warbling
you could not have been warbling
she could not have been warbling
we could not have been warbling
you could not have been warbling
they could not have been warbling	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I warble?
could you warble?
could she warble?
could we warble?
could you warble?
could they warble? 	could I be warbling?
could you be warbling?
could she be warbling?
could we be warbling?
could you be warbling?
could they be warbling? 	could I have warbled?
could you have warbled?
could she have warbled?
could we have warbled?
could you have warbled?
could they have warbled? 	could I have been warbling?
could you have been warbling?
could she have been warbling?
could we have been warbling?
could you have been warbling?
could they have been warbling? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not warble?
could you not warble?
could she not warble?
could we not warble?
could you not warble?
could they not warble? 	could I not be warbling?
could you not be warbling?
could she not be warbling?
could we not be warbling?
could you not be warbling?
could they not be warbling? 	could I not have warbled?
could you not have warbled?
could she not have warbled?
could we not have warbled?
could you not have warbled?
could they not have warbled? 	could I not have been warbling?
could you not have been warbling?
could she not have been warbling?
could we not have been warbling?
could you not have been warbling?
could they not have been warbling?