could keen
Verbo regular: keen - keened- keened

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could keen
you could keen
she could keen
we could keen
you could keen
they could keen 	I could be keening
you could be keening
she could be keening
we could be keening
you could be keening
they could be keening	I could have keened
you could have keened
she could have keened
we could have keened
you could have keened
they could have keened	I could have been keening
you could have been keening
she could have been keening
we could have been keening
you could have been keening
they could have been keening	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't keen
you couldn't keen
she couldn't keen
we couldn't keen
you couldn't keen
they couldn't keen 	I couldn't be keening
you couldn't be keening
she couldn't be keening
we couldn't be keening
you couldn't be keening
they couldn't be keening	I couldn't have keened
you couldn't have keened
she couldn't have keened
we couldn't have keened
you couldn't have keened
they couldn't have keened	I couldn't have been keening
you couldn't have been keening
she couldn't have been keening
we couldn't have been keening
you couldn't have been keening
they couldn't have been keening	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I keen?
could you keen?
could she keen?
could we keen?
could you keen?
could they keen? 	could I be keening?
could you be keening?
could she be keening?
could we be keening?
could you be keening?
could they be keening? 	could I have keened?
could you have keened?
could she have keened?
could we have keened?
could you have keened?
could they have keened? 	could I have been keening?
could you have been keening?
could she have been keening?
could we have been keening?
could you have been keening?
could they have been keening? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I keen?
couldn't you keen?
couldn't she keen?
couldn't we keen?
couldn't you keen?
couldn't they keen? 	couldn't I be keening?
couldn't you be keening?
couldn't she be keening?
couldn't we be keening?
couldn't you be keening?
couldn't they be keening? 	couldn't I have keened?
couldn't you have keened?
couldn't she have keened?
couldn't we have keened?
couldn't you have keened?
couldn't they have keened? 	couldn't I have been keening?
couldn't you have been keening?
couldn't she have been keening?
couldn't we have been keening?
couldn't you have been keening?
couldn't they have been keening?