English verb conjugation
CAN OVERSTAFF

Regular verb: overstaff - overstaffed - overstaffed

Affirmation

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