could work
Verbo regular: work - worked- worked

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could work
you could work
he could work
we could work
you could work
they could work 	I could be working
you could be working
he could be working
we could be working
you could be working
they could be working	I could have worked
you could have worked
he could have worked
we could have worked
you could have worked
they could have worked	I could have been working
you could have been working
he could have been working
we could have been working
you could have been working
they could have been working	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't work
you couldn't work
he couldn't work
we couldn't work
you couldn't work
they couldn't work 	I couldn't be working
you couldn't be working
he couldn't be working
we couldn't be working
you couldn't be working
they couldn't be working	I couldn't have worked
you couldn't have worked
he couldn't have worked
we couldn't have worked
you couldn't have worked
they couldn't have worked	I couldn't have been working
you couldn't have been working
he couldn't have been working
we couldn't have been working
you couldn't have been working
they couldn't have been working	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I work?
could you work?
could he work?
could we work?
could you work?
could they work? 	could I be working?
could you be working?
could he be working?
could we be working?
could you be working?
could they be working? 	could I have worked?
could you have worked?
could he have worked?
could we have worked?
could you have worked?
could they have worked? 	could I have been working?
could you have been working?
could he have been working?
could we have been working?
could you have been working?
could they have been working? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I work?
couldn't you work?
couldn't he work?
couldn't we work?
couldn't you work?
couldn't they work? 	couldn't I be working?
couldn't you be working?
couldn't he be working?
couldn't we be working?
couldn't you be working?
couldn't they be working? 	couldn't I have worked?
couldn't you have worked?
couldn't he have worked?
couldn't we have worked?
couldn't you have worked?
couldn't they have worked? 	couldn't I have been working?
couldn't you have been working?
couldn't he have been working?
couldn't we have been working?
couldn't you have been working?
couldn't they have been working?