should tune
Verbo regular: tune - tuned- tuned

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I should tune
you should tune
he should tune
we should tune
you should tune
they should tune 	I should be tuning
you should be tuning
he should be tuning
we should be tuning
you should be tuning
they should be tuning	I should have tuned
you should have tuned
he should have tuned
we should have tuned
you should have tuned
they should have tuned	I should have been tuning
you should have been tuning
he should have been tuning
we should have been tuning
you should have been tuning
they should have been tuning	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I should not tune
you should not tune
he should not tune
we should not tune
you should not tune
they should not tune 	I should not be tuning
you should not be tuning
he should not be tuning
we should not be tuning
you should not be tuning
they should not be tuning	I should not have tuned
you should not have tuned
he should not have tuned
we should not have tuned
you should not have tuned
they should not have tuned	I should not have been tuning
you should not have been tuning
he should not have been tuning
we should not have been tuning
you should not have been tuning
they should not have been tuning	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I tune?
should you tune?
should he tune?
should we tune?
should you tune?
should they tune? 	should I be tuning?
should you be tuning?
should he be tuning?
should we be tuning?
should you be tuning?
should they be tuning? 	should I have tuned?
should you have tuned?
should he have tuned?
should we have tuned?
should you have tuned?
should they have tuned? 	should I have been tuning?
should you have been tuning?
should he have been tuning?
should we have been tuning?
should you have been tuning?
should they have been tuning? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I not tune?
should you not tune?
should he not tune?
should we not tune?
should you not tune?
should they not tune? 	should I not be tuning?
should you not be tuning?
should he not be tuning?
should we not be tuning?
should you not be tuning?
should they not be tuning? 	should I not have tuned?
should you not have tuned?
should he not have tuned?
should we not have tuned?
should you not have tuned?
should they not have tuned? 	should I not have been tuning?
should you not have been tuning?
should he not have been tuning?
should we not have been tuning?
should you not have been tuning?
should they not have been tuning?