could overwork
Verbo regular: overwork - overworked- overworked

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could overwork
you could overwork
he could overwork
we could overwork
you could overwork
they could overwork 	I could be overworking
you could be overworking
he could be overworking
we could be overworking
you could be overworking
they could be overworking	I could have overworked
you could have overworked
he could have overworked
we could have overworked
you could have overworked
they could have overworked	I could have been overworking
you could have been overworking
he could have been overworking
we could have been overworking
you could have been overworking
they could have been overworking	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't overwork
you couldn't overwork
he couldn't overwork
we couldn't overwork
you couldn't overwork
they couldn't overwork 	I couldn't be overworking
you couldn't be overworking
he couldn't be overworking
we couldn't be overworking
you couldn't be overworking
they couldn't be overworking	I couldn't have overworked
you couldn't have overworked
he couldn't have overworked
we couldn't have overworked
you couldn't have overworked
they couldn't have overworked	I couldn't have been overworking
you couldn't have been overworking
he couldn't have been overworking
we couldn't have been overworking
you couldn't have been overworking
they couldn't have been overworking	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I overwork?
could you overwork?
could he overwork?
could we overwork?
could you overwork?
could they overwork? 	could I be overworking?
could you be overworking?
could he be overworking?
could we be overworking?
could you be overworking?
could they be overworking? 	could I have overworked?
could you have overworked?
could he have overworked?
could we have overworked?
could you have overworked?
could they have overworked? 	could I have been overworking?
could you have been overworking?
could he have been overworking?
could we have been overworking?
could you have been overworking?
could they have been overworking? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I overwork?
couldn't you overwork?
couldn't he overwork?
couldn't we overwork?
couldn't you overwork?
couldn't they overwork? 	couldn't I be overworking?
couldn't you be overworking?
couldn't he be overworking?
couldn't we be overworking?
couldn't you be overworking?
couldn't they be overworking? 	couldn't I have overworked?
couldn't you have overworked?
couldn't he have overworked?
couldn't we have overworked?
couldn't you have overworked?
couldn't they have overworked? 	couldn't I have been overworking?
couldn't you have been overworking?
couldn't he have been overworking?
couldn't we have been overworking?
couldn't you have been overworking?
couldn't they have been overworking?