could behave
Verbo regular: behave - behaved- behaved

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could behave
you could behave
he could behave
we could behave
you could behave
they could behave 	I could be behaving
you could be behaving
he could be behaving
we could be behaving
you could be behaving
they could be behaving	I could have behaved
you could have behaved
he could have behaved
we could have behaved
you could have behaved
they could have behaved	I could have been behaving
you could have been behaving
he could have been behaving
we could have been behaving
you could have been behaving
they could have been behaving	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not behave
you could not behave
he could not behave
we could not behave
you could not behave
they could not behave 	I could not be behaving
you could not be behaving
he could not be behaving
we could not be behaving
you could not be behaving
they could not be behaving	I could not have behaved
you could not have behaved
he could not have behaved
we could not have behaved
you could not have behaved
they could not have behaved	I could not have been behaving
you could not have been behaving
he could not have been behaving
we could not have been behaving
you could not have been behaving
they could not have been behaving	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I behave?
could you behave?
could he behave?
could we behave?
could you behave?
could they behave? 	could I be behaving?
could you be behaving?
could he be behaving?
could we be behaving?
could you be behaving?
could they be behaving? 	could I have behaved?
could you have behaved?
could he have behaved?
could we have behaved?
could you have behaved?
could they have behaved? 	could I have been behaving?
could you have been behaving?
could he have been behaving?
could we have been behaving?
could you have been behaving?
could they have been behaving? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not behave?
could you not behave?
could he not behave?
could we not behave?
could you not behave?
could they not behave? 	could I not be behaving?
could you not be behaving?
could he not be behaving?
could we not be behaving?
could you not be behaving?
could they not be behaving? 	could I not have behaved?
could you not have behaved?
could he not have behaved?
could we not have behaved?
could you not have behaved?
could they not have behaved? 	could I not have been behaving?
could you not have been behaving?
could he not have been behaving?
could we not have been behaving?
could you not have been behaving?
could they not have been behaving?