could work
Verbo regular: work - worked- worked

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com 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	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not work
you could not work
he could not work
we could not work
you could not work
they could not work 	I could not be working
you could not be working
he could not be working
we could not be working
you could not be working
they could not be working	I could not have worked
you could not have worked
he could not have worked
we could not have worked
you could not have worked
they could not have worked	I could not have been working
you could not have been working
he could not have been working
we could not have been working
you could not have been working
they could not have been working	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com 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-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not work?
could you not work?
could he not work?
could we not work?
could you not work?
could they not work? 	could I not be working?
could you not be working?
could he not be working?
could we not be working?
could you not be working?
could they not be working? 	could I not have worked?
could you not have worked?
could he not have worked?
could we not have worked?
could you not have worked?
could they not have worked? 	could I not have been working?
could you not have been working?
could he not have been working?
could we not have been working?
could you not have been working?
could they not have been working?