could build
Verbo irregular: build - built- built

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could build
you could build
he could build
we could build
you could build
they could build 	I could be building
you could be building
he could be building
we could be building
you could be building
they could be building	I could have built
you could have built
he could have built
we could have built
you could have built
they could have built	I could have been building
you could have been building
he could have been building
we could have been building
you could have been building
they could have been building	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not build
you could not build
he could not build
we could not build
you could not build
they could not build 	I could not be building
you could not be building
he could not be building
we could not be building
you could not be building
they could not be building	I could not have built
you could not have built
he could not have built
we could not have built
you could not have built
they could not have built	I could not have been building
you could not have been building
he could not have been building
we could not have been building
you could not have been building
they could not have been building	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I build?
could you build?
could he build?
could we build?
could you build?
could they build? 	could I be building?
could you be building?
could he be building?
could we be building?
could you be building?
could they be building? 	could I have built?
could you have built?
could he have built?
could we have built?
could you have built?
could they have built? 	could I have been building?
could you have been building?
could he have been building?
could we have been building?
could you have been building?
could they have been building? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not build?
could you not build?
could he not build?
could we not build?
could you not build?
could they not build? 	could I not be building?
could you not be building?
could he not be building?
could we not be building?
could you not be building?
could they not be building? 	could I not have built?
could you not have built?
could he not have built?
could we not have built?
could you not have built?
could they not have built? 	could I not have been building?
could you not have been building?
could he not have been building?
could we not have been building?
could you not have been building?
could they not have been building?