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
she could build
we could build
you could build
they could build 	I could be building
you could be building
she could be building
we could be building
you could be building
they could be building	I could have built
you could have built
she 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
she 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 couldn't build
you couldn't build
she couldn't build
we couldn't build
you couldn't build
they couldn't build 	I couldn't be building
you couldn't be building
she couldn't be building
we couldn't be building
you couldn't be building
they couldn't be building	I couldn't have built
you couldn't have built
she couldn't have built
we couldn't have built
you couldn't have built
they couldn't have built	I couldn't have been building
you couldn't have been building
she couldn't have been building
we couldn't have been building
you couldn't have been building
they couldn't have been building	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I build?
could you build?
could she build?
could we build?
could you build?
could they build? 	could I be building?
could you be building?
could she be building?
could we be building?
could you be building?
could they be building? 	could I have built?
could you have built?
could she 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 she 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 	
couldn't I build?
couldn't you build?
couldn't she build?
couldn't we build?
couldn't you build?
couldn't they build? 	couldn't I be building?
couldn't you be building?
couldn't she be building?
couldn't we be building?
couldn't you be building?
couldn't they be building? 	couldn't I have built?
couldn't you have built?
couldn't she have built?
couldn't we have built?
couldn't you have built?
couldn't they have built? 	couldn't I have been building?
couldn't you have been building?
couldn't she have been building?
couldn't we have been building?
couldn't you have been building?
couldn't they have been building?