can tune
Regular verb: tune - tuned- tuned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can tune
you can tune
he can tune
we can tune
you can tune
they can tune 	I can be tuning
you can be tuning
he can be tuning
we can be tuning
you can be tuning
they can be tuning	I can have tuned
you can have tuned
he 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
he can have been tuning
we can have been tuning
you can have been tuning
they can have been tuning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't tune
you can't tune
he can't tune
we can't tune
you can't tune
they can't tune 	I can't be tuning
you can't be tuning
he can't be tuning
we can't be tuning
you can't be tuning
they can't be tuning	I can't have tuned
you can't have tuned
he can't have tuned
we can't have tuned
you can't have tuned
they can't have tuned	I can't have been tuning
you can't have been tuning
he can't have been tuning
we can't have been tuning
you can't have been tuning
they can't have been tuning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I tune?
can you tune?
can he tune?
can we tune?
can you tune?
can they tune? 	can I be tuning?
can you be tuning?
can he be tuning?
can we be tuning?
can you be tuning?
can they be tuning? 	can I have tuned?
can you have tuned?
can he 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 he have been tuning?
can we have been tuning?
can you have been tuning?
can they have been tuning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I tune?
can't you tune?
can't he tune?
can't we tune?
can't you tune?
can't they tune? 	can't I be tuning?
can't you be tuning?
can't he be tuning?
can't we be tuning?
can't you be tuning?
can't they be tuning? 	can't I have tuned?
can't you have tuned?
can't he have tuned?
can't we have tuned?
can't you have tuned?
can't they have tuned? 	can't I have been tuning?
can't you have been tuning?
can't he have been tuning?
can't we have been tuning?
can't you have been tuning?
can't they have been tuning?