should stale
Regular verb: stale - staled- staled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd stale
you'd stale
she'd stale
we'd stale
you'd stale
they'd stale 	I'd be staling
you'd be staling
she'd be staling
we'd be staling
you'd be staling
they'd be staling	I should've staled
you should've staled
she should've staled
we should've staled
you should've staled
they should've staled	I should've been staling
you should've been staling
she should've been staling
we should've been staling
you should've been staling
they should've been staling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't stale
you shouldn't stale
she shouldn't stale
we shouldn't stale
you shouldn't stale
they shouldn't stale 	I shouldn't be staling
you shouldn't be staling
she shouldn't be staling
we shouldn't be staling
you shouldn't be staling
they shouldn't be staling	I shouldn't have staled
you shouldn't have staled
she shouldn't have staled
we shouldn't have staled
you shouldn't have staled
they shouldn't have staled	I shouldn't have been staling
you shouldn't have been staling
she shouldn't have been staling
we shouldn't have been staling
you shouldn't have been staling
they shouldn't have been staling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I stale?
should you stale?
should she stale?
should we stale?
should you stale?
should they stale? 	should I be staling?
should you be staling?
should she be staling?
should we be staling?
should you be staling?
should they be staling? 	should I have staled?
should you have staled?
should she have staled?
should we have staled?
should you have staled?
should they have staled? 	should I have been staling?
should you have been staling?
should she have been staling?
should we have been staling?
should you have been staling?
should they have been staling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I stale?
shouldn't you stale?
shouldn't she stale?
shouldn't we stale?
shouldn't you stale?
shouldn't they stale? 	shouldn't I be staling?
shouldn't you be staling?
shouldn't she be staling?
shouldn't we be staling?
shouldn't you be staling?
shouldn't they be staling? 	shouldn't I have staled?
shouldn't you have staled?
shouldn't she have staled?
shouldn't we have staled?
shouldn't you have staled?
shouldn't they have staled? 	shouldn't I have been staling?
shouldn't you have been staling?
shouldn't she have been staling?
shouldn't we have been staling?
shouldn't you have been staling?
shouldn't they have been staling?