may overstaff
Regular verb: overstaff - overstaffed- overstaffed

Affirmation 	
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I may overstaff
you may overstaff
she may overstaff
we may overstaff
you may overstaff
they may overstaff 	I may be overstaffing
you may be overstaffing
she may be overstaffing
we may be overstaffing
you may be overstaffing
they may be overstaffing	I may have overstaffed
you may have overstaffed
she may have overstaffed
we may have overstaffed
you may have overstaffed
they may have overstaffed	I may have been overstaffing
you may have been overstaffing
she may have been overstaffing
we may have been overstaffing
you may have been overstaffing
they may have been overstaffing	

Negation 	
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I mayn't overstaff
you mayn't overstaff
she mayn't overstaff
we mayn't overstaff
you mayn't overstaff
they mayn't overstaff 	I mayn't be overstaffing
you mayn't be overstaffing
she mayn't be overstaffing
we mayn't be overstaffing
you mayn't be overstaffing
they mayn't be overstaffing	I mayn't have overstaffed
you mayn't have overstaffed
she mayn't have overstaffed
we mayn't have overstaffed
you mayn't have overstaffed
they mayn't have overstaffed	I mayn't have been overstaffing
you mayn't have been overstaffing
she mayn't have been overstaffing
we mayn't have been overstaffing
you mayn't have been overstaffing
they mayn't have been overstaffing	

Interrogative form 	
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may I overstaff?
may you overstaff?
may she overstaff?
may we overstaff?
may you overstaff?
may they overstaff? 	may I be overstaffing?
may you be overstaffing?
may she be overstaffing?
may we be overstaffing?
may you be overstaffing?
may they be overstaffing? 	may I have overstaffed?
may you have overstaffed?
may she have overstaffed?
may we have overstaffed?
may you have overstaffed?
may they have overstaffed? 	may I have been overstaffing?
may you have been overstaffing?
may she have been overstaffing?
may we have been overstaffing?
may you have been overstaffing?
may they have been overstaffing? 	

Interro-negative form 	
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mayn't I overstaff?
mayn't you overstaff?
mayn't she overstaff?
mayn't we overstaff?
mayn't you overstaff?
mayn't they overstaff? 	mayn't I be overstaffing?
mayn't you be overstaffing?
mayn't she be overstaffing?
mayn't we be overstaffing?
mayn't you be overstaffing?
mayn't they be overstaffing? 	mayn't I have overstaffed?
mayn't you have overstaffed?
mayn't she have overstaffed?
mayn't we have overstaffed?
mayn't you have overstaffed?
mayn't they have overstaffed? 	mayn't I have been overstaffing?
mayn't you have been overstaffing?
mayn't she have been overstaffing?
mayn't we have been overstaffing?
mayn't you have been overstaffing?
mayn't they have been overstaffing?