can overstaff
Regular verb: overstaff - overstaffed- overstaffed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can overstaff
you can overstaff
she can overstaff
we can overstaff
you can overstaff
they can overstaff 	I can be overstaffing
you can be overstaffing
she can be overstaffing
we can be overstaffing
you can be overstaffing
they can be overstaffing	I can have overstaffed
you can have overstaffed
she can have overstaffed
we can have overstaffed
you can have overstaffed
they can have overstaffed	I can have been overstaffing
you can have been overstaffing
she can have been overstaffing
we can have been overstaffing
you can have been overstaffing
they can have been overstaffing	

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

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

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