could install
Verbo regular: install - installed- installed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could install
you could install
he could install
we could install
you could install
they could install 	I could be installing
you could be installing
he could be installing
we could be installing
you could be installing
they could be installing	I could have installed
you could have installed
he could have installed
we could have installed
you could have installed
they could have installed	I could have been installing
you could have been installing
he could have been installing
we could have been installing
you could have been installing
they could have been installing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't install
you couldn't install
he couldn't install
we couldn't install
you couldn't install
they couldn't install 	I couldn't be installing
you couldn't be installing
he couldn't be installing
we couldn't be installing
you couldn't be installing
they couldn't be installing	I couldn't have installed
you couldn't have installed
he couldn't have installed
we couldn't have installed
you couldn't have installed
they couldn't have installed	I couldn't have been installing
you couldn't have been installing
he couldn't have been installing
we couldn't have been installing
you couldn't have been installing
they couldn't have been installing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I install?
could you install?
could he install?
could we install?
could you install?
could they install? 	could I be installing?
could you be installing?
could he be installing?
could we be installing?
could you be installing?
could they be installing? 	could I have installed?
could you have installed?
could he have installed?
could we have installed?
could you have installed?
could they have installed? 	could I have been installing?
could you have been installing?
could he have been installing?
could we have been installing?
could you have been installing?
could they have been installing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I install?
couldn't you install?
couldn't he install?
couldn't we install?
couldn't you install?
couldn't they install? 	couldn't I be installing?
couldn't you be installing?
couldn't he be installing?
couldn't we be installing?
couldn't you be installing?
couldn't they be installing? 	couldn't I have installed?
couldn't you have installed?
couldn't he have installed?
couldn't we have installed?
couldn't you have installed?
couldn't they have installed? 	couldn't I have been installing?
couldn't you have been installing?
couldn't he have been installing?
couldn't we have been installing?
couldn't you have been installing?
couldn't they have been installing?