should overstaff
Regular verb: overstaff - overstaffed- overstaffed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd overstaff
you'd overstaff
she'd overstaff
we'd overstaff
you'd overstaff
they'd overstaff 	I'd be overstaffing
you'd be overstaffing
she'd be overstaffing
we'd be overstaffing
you'd be overstaffing
they'd be overstaffing	I should've overstaffed
you should've overstaffed
she should've overstaffed
we should've overstaffed
you should've overstaffed
they should've overstaffed	I should've been overstaffing
you should've been overstaffing
she should've been overstaffing
we should've been overstaffing
you should've been overstaffing
they should've been overstaffing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't overstaff
you shouldn't overstaff
she shouldn't overstaff
we shouldn't overstaff
you shouldn't overstaff
they shouldn't overstaff 	I shouldn't be overstaffing
you shouldn't be overstaffing
she shouldn't be overstaffing
we shouldn't be overstaffing
you shouldn't be overstaffing
they shouldn't be overstaffing	I shouldn't have overstaffed
you shouldn't have overstaffed
she shouldn't have overstaffed
we shouldn't have overstaffed
you shouldn't have overstaffed
they shouldn't have overstaffed	I shouldn't have been overstaffing
you shouldn't have been overstaffing
she shouldn't have been overstaffing
we shouldn't have been overstaffing
you shouldn't have been overstaffing
they shouldn't have been overstaffing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I overstaff?
should you overstaff?
should she overstaff?
should we overstaff?
should you overstaff?
should they overstaff? 	should I be overstaffing?
should you be overstaffing?
should she be overstaffing?
should we be overstaffing?
should you be overstaffing?
should they be overstaffing? 	should I have overstaffed?
should you have overstaffed?
should she have overstaffed?
should we have overstaffed?
should you have overstaffed?
should they have overstaffed? 	should I have been overstaffing?
should you have been overstaffing?
should she have been overstaffing?
should we have been overstaffing?
should you have been overstaffing?
should they have been overstaffing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I overstaff?
shouldn't you overstaff?
shouldn't she overstaff?
shouldn't we overstaff?
shouldn't you overstaff?
shouldn't they overstaff? 	shouldn't I be overstaffing?
shouldn't you be overstaffing?
shouldn't she be overstaffing?
shouldn't we be overstaffing?
shouldn't you be overstaffing?
shouldn't they be overstaffing? 	shouldn't I have overstaffed?
shouldn't you have overstaffed?
shouldn't she have overstaffed?
shouldn't we have overstaffed?
shouldn't you have overstaffed?
shouldn't they have overstaffed? 	shouldn't I have been overstaffing?
shouldn't you have been overstaffing?
shouldn't she have been overstaffing?
shouldn't we have been overstaffing?
shouldn't you have been overstaffing?
shouldn't they have been overstaffing?