should sack
Regular verb: sack - sacked- sacked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd sack
you'd sack
she'd sack
we'd sack
you'd sack
they'd sack 	I'd be sacking
you'd be sacking
she'd be sacking
we'd be sacking
you'd be sacking
they'd be sacking	I should've sacked
you should've sacked
she should've sacked
we should've sacked
you should've sacked
they should've sacked	I should've been sacking
you should've been sacking
she should've been sacking
we should've been sacking
you should've been sacking
they should've been sacking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't sack
you shouldn't sack
she shouldn't sack
we shouldn't sack
you shouldn't sack
they shouldn't sack 	I shouldn't be sacking
you shouldn't be sacking
she shouldn't be sacking
we shouldn't be sacking
you shouldn't be sacking
they shouldn't be sacking	I shouldn't have sacked
you shouldn't have sacked
she shouldn't have sacked
we shouldn't have sacked
you shouldn't have sacked
they shouldn't have sacked	I shouldn't have been sacking
you shouldn't have been sacking
she shouldn't have been sacking
we shouldn't have been sacking
you shouldn't have been sacking
they shouldn't have been sacking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I sack?
should you sack?
should she sack?
should we sack?
should you sack?
should they sack? 	should I be sacking?
should you be sacking?
should she be sacking?
should we be sacking?
should you be sacking?
should they be sacking? 	should I have sacked?
should you have sacked?
should she have sacked?
should we have sacked?
should you have sacked?
should they have sacked? 	should I have been sacking?
should you have been sacking?
should she have been sacking?
should we have been sacking?
should you have been sacking?
should they have been sacking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I sack?
shouldn't you sack?
shouldn't she sack?
shouldn't we sack?
shouldn't you sack?
shouldn't they sack? 	shouldn't I be sacking?
shouldn't you be sacking?
shouldn't she be sacking?
shouldn't we be sacking?
shouldn't you be sacking?
shouldn't they be sacking? 	shouldn't I have sacked?
shouldn't you have sacked?
shouldn't she have sacked?
shouldn't we have sacked?
shouldn't you have sacked?
shouldn't they have sacked? 	shouldn't I have been sacking?
shouldn't you have been sacking?
shouldn't she have been sacking?
shouldn't we have been sacking?
shouldn't you have been sacking?
shouldn't they have been sacking?