I could oversee you could oversee she could oversee we could oversee you could oversee they could oversee
V-ing form
I could be overseeing you could be overseeing she could be overseeing we could be overseeing you could be overseeing they could be overseeing
Perfect
I could have overseen you could have overseen she could have overseen we could have overseen you could have overseen they could have overseen
V-ing perfect
I could have been overseeing you could have been overseeing she could have been overseeing we could have been overseeing you could have been overseeing they could have been overseeing
Negation
Simple form
I could not oversee you could not oversee she could not oversee we could not oversee you could not oversee they could not oversee
V-ing form
I could not be overseeing you could not be overseeing she could not be overseeing we could not be overseeing you could not be overseeing they could not be overseeing
Perfect
I could not have overseen you could not have overseen she could not have overseen we could not have overseen you could not have overseen they could not have overseen
V-ing perfect
I could not have been overseeing you could not have been overseeing she could not have been overseeing we could not have been overseeing you could not have been overseeing they could not have been overseeing
Interrogative form
Simple form
could I oversee? could you oversee? could she oversee? could we oversee? could you oversee? could they oversee?
V-ing form
could I be overseeing? could you be overseeing? could she be overseeing? could we be overseeing? could you be overseeing? could they be overseeing?
Perfect
could I have overseen? could you have overseen? could she have overseen? could we have overseen? could you have overseen? could they have overseen?
V-ing perfect
could I have been overseeing? could you have been overseeing? could she have been overseeing? could we have been overseeing? could you have been overseeing? could they have been overseeing?
Interro-negative form
Simple form
could I not oversee? could you not oversee? could she not oversee? could we not oversee? could you not oversee? could they not oversee?
V-ing form
could I not be overseeing? could you not be overseeing? could she not be overseeing? could we not be overseeing? could you not be overseeing? could they not be overseeing?
Perfect
could I not have overseen? could you not have overseen? could she not have overseen? could we not have overseen? could you not have overseen? could they not have overseen?
V-ing perfect
could I not have been overseeing? could you not have been overseeing? could she not have been overseeing? could we not have been overseeing? could you not have been overseeing? could they not have been overseeing?