should tun
Regular verb: tun - tuned- tuned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd tun
you'd tun
he'd tun
we'd tun
you'd tun
they'd tun 	I'd be tuning
you'd be tuning
he'd be tuning
we'd be tuning
you'd be tuning
they'd be tuning	I should've tuned
you should've tuned
he should've tuned
we should've tuned
you should've tuned
they should've tuned	I should've been tuning
you should've been tuning
he should've been tuning
we should've been tuning
you should've been tuning
they should've been tuning	

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

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I tun?
should you tun?
should he tun?
should we tun?
should you tun?
should they tun? 	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? 	

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