can tun
Verbo regular: tun - tuned- tuned

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can tun
you can tun
she can tun
we can tun
you can tun
they can tun 	I can be tuning
you can be tuning
she can be tuning
we can be tuning
you can be tuning
they can be tuning	I can have tuned
you can have tuned
she can have tuned
we can have tuned
you can have tuned
they can have tuned	I can have been tuning
you can have been tuning
she can have been tuning
we can have been tuning
you can have been tuning
they can have been tuning	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I cannot tun
you cannot tun
she cannot tun
we cannot tun
you cannot tun
they cannot tun 	I cannot be tuning
you cannot be tuning
she cannot be tuning
we cannot be tuning
you cannot be tuning
they cannot be tuning	I cannot have tuned
you cannot have tuned
she cannot have tuned
we cannot have tuned
you cannot have tuned
they cannot have tuned	I cannot have been tuning
you cannot have been tuning
she cannot have been tuning
we cannot have been tuning
you cannot have been tuning
they cannot have been tuning	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I tun?
can you tun?
can she tun?
can we tun?
can you tun?
can they tun? 	can I be tuning?
can you be tuning?
can she be tuning?
can we be tuning?
can you be tuning?
can they be tuning? 	can I have tuned?
can you have tuned?
can she have tuned?
can we have tuned?
can you have tuned?
can they have tuned? 	can I have been tuning?
can you have been tuning?
can she have been tuning?
can we have been tuning?
can you have been tuning?
can they have been tuning? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I not tun?
can you not tun?
can she not tun?
can we not tun?
can you not tun?
can they not tun? 	can I not be tuning?
can you not be tuning?
can she not be tuning?
can we not be tuning?
can you not be tuning?
can they not be tuning? 	can I not have tuned?
can you not have tuned?
can she not have tuned?
can we not have tuned?
can you not have tuned?
can they not have tuned? 	can I not have been tuning?
can you not have been tuning?
can she not have been tuning?
can we not have been tuning?
can you not have been tuning?
can they not have been tuning?