could use
Verbo regolare: use - used- used

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could use
you could use
he could use
we could use
you could use
they could use 	I could be using
you could be using
he could be using
we could be using
you could be using
they could be using	I could have used
you could have used
he could have used
we could have used
you could have used
they could have used	I could have been using
you could have been using
he could have been using
we could have been using
you could have been using
they could have been using	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could not use
you could not use
he could not use
we could not use
you could not use
they could not use 	I could not be using
you could not be using
he could not be using
we could not be using
you could not be using
they could not be using	I could not have used
you could not have used
he could not have used
we could not have used
you could not have used
they could not have used	I could not have been using
you could not have been using
he could not have been using
we could not have been using
you could not have been using
they could not have been using	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I use?
could you use?
could he use?
could we use?
could you use?
could they use? 	could I be using?
could you be using?
could he be using?
could we be using?
could you be using?
could they be using? 	could I have used?
could you have used?
could he have used?
could we have used?
could you have used?
could they have used? 	could I have been using?
could you have been using?
could he have been using?
could we have been using?
could you have been using?
could they have been using? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I not use?
could you not use?
could he not use?
could we not use?
could you not use?
could they not use? 	could I not be using?
could you not be using?
could he not be using?
could we not be using?
could you not be using?
could they not be using? 	could I not have used?
could you not have used?
could he not have used?
could we not have used?
could you not have used?
could they not have used? 	could I not have been using?
could you not have been using?
could he not have been using?
could we not have been using?
could you not have been using?
could they not have been using?