English verb conjugation
COULD OVERSTAFF

Regular verb: overstaff - overstaffed - overstaffed

Affirmation

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

Negation

Simple form	V-ing form
I could not overstaff you could not overstaff she could not overstaff we could not overstaff you could not overstaff they could not overstaff	I could not be overstaffing you could not be overstaffing she could not be overstaffing we could not be overstaffing you could not be overstaffing they could not be overstaffing
Perfect	V-ing perfect
I could not have overstaffed you could not have overstaffed she could not have overstaffed we could not have overstaffed you could not have overstaffed they could not have overstaffed	I could not have been overstaffing you could not have been overstaffing she could not have been overstaffing we could not have been overstaffing you could not have been overstaffing they could not have been overstaffing

Interrogative form

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

Interro-negative form

Simple form	V-ing form
could I not overstaff? could you not overstaff? could she not overstaff? could we not overstaff? could you not overstaff? could they not overstaff?	could I not be overstaffing? could you not be overstaffing? could she not be overstaffing? could we not be overstaffing? could you not be overstaffing? could they not be overstaffing?
Perfect	V-ing perfect
could I not have overstaffed? could you not have overstaffed? could she not have overstaffed? could we not have overstaffed? could you not have overstaffed? could they not have overstaffed?	could I not have been overstaffing? could you not have been overstaffing? could she not have been overstaffing? could we not have been overstaffing? could you not have been overstaffing? could they not have been overstaffing?