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 cannot overstaff
you cannot overstaff
she cannot overstaff
we cannot overstaff
you cannot overstaff
they cannot overstaff 	I cannot be overstaffing
you cannot be overstaffing
she cannot be overstaffing
we cannot be overstaffing
you cannot be overstaffing
they cannot be overstaffing	I cannot have overstaffed
you cannot have overstaffed
she cannot have overstaffed
we cannot have overstaffed
you cannot have overstaffed
they cannot have overstaffed	I cannot have been overstaffing
you cannot have been overstaffing
she cannot have been overstaffing
we cannot have been overstaffing
you cannot have been overstaffing
they cannot 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 I not overstaff?
can you not overstaff?
can she not overstaff?
can we not overstaff?
can you not overstaff?
can they not overstaff? 	can I not be overstaffing?
can you not be overstaffing?
can she not be overstaffing?
can we not be overstaffing?
can you not be overstaffing?
can they not be overstaffing? 	can I not have overstaffed?
can you not have overstaffed?
can she not have overstaffed?
can we not have overstaffed?
can you not have overstaffed?
can they not have overstaffed? 	can I not have been overstaffing?
can you not have been overstaffing?
can she not have been overstaffing?
can we not have been overstaffing?
can you not have been overstaffing?
can they not have been overstaffing?