could tun
Verbo regolare: tun - tuned- tuned

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could tun
you could tun
he could tun
we could tun
you could tun
they could tun 	I could be tuning
you could be tuning
he could be tuning
we could be tuning
you could be tuning
they could be tuning	I could have tuned
you could have tuned
he could have tuned
we could have tuned
you could have tuned
they could have tuned	I could have been tuning
you could have been tuning
he could have been tuning
we could have been tuning
you could have been tuning
they could have been tuning	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could not tun
you could not tun
he could not tun
we could not tun
you could not tun
they could not tun 	I could not be tuning
you could not be tuning
he could not be tuning
we could not be tuning
you could not be tuning
they could not be tuning	I could not have tuned
you could not have tuned
he could not have tuned
we could not have tuned
you could not have tuned
they could not have tuned	I could not have been tuning
you could not have been tuning
he could not have been tuning
we could not have been tuning
you could not have been tuning
they could not have been tuning	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I tun?
could you tun?
could he tun?
could we tun?
could you tun?
could they tun? 	could I be tuning?
could you be tuning?
could he be tuning?
could we be tuning?
could you be tuning?
could they be tuning? 	could I have tuned?
could you have tuned?
could he have tuned?
could we have tuned?
could you have tuned?
could they have tuned? 	could I have been tuning?
could you have been tuning?
could he have been tuning?
could we have been tuning?
could you have been tuning?
could they have been tuning? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I not tun?
could you not tun?
could he not tun?
could we not tun?
could you not tun?
could they not tun? 	could I not be tuning?
could you not be tuning?
could he not be tuning?
could we not be tuning?
could you not be tuning?
could they not be tuning? 	could I not have tuned?
could you not have tuned?
could he not have tuned?
could we not have tuned?
could you not have tuned?
could they not have tuned? 	could I not have been tuning?
could you not have been tuning?
could he not have been tuning?
could we not have been tuning?
could you not have been tuning?
could they not have been tuning?