I could qualify you could qualify she could qualify we could qualify you could qualify they could qualify
V-ing form
I could be qualifying you could be qualifying she could be qualifying we could be qualifying you could be qualifying they could be qualifying
Perfect
I could have qualified you could have qualified she could have qualified we could have qualified you could have qualified they could have qualified
V-ing perfect
I could have been qualifying you could have been qualifying she could have been qualifying we could have been qualifying you could have been qualifying they could have been qualifying
Negation
Simple form
I could not qualify you could not qualify she could not qualify we could not qualify you could not qualify they could not qualify
V-ing form
I could not be qualifying you could not be qualifying she could not be qualifying we could not be qualifying you could not be qualifying they could not be qualifying
Perfect
I could not have qualified you could not have qualified she could not have qualified we could not have qualified you could not have qualified they could not have qualified
V-ing perfect
I could not have been qualifying you could not have been qualifying she could not have been qualifying we could not have been qualifying you could not have been qualifying they could not have been qualifying
Interrogative form
Simple form
could I qualify? could you qualify? could she qualify? could we qualify? could you qualify? could they qualify?
V-ing form
could I be qualifying? could you be qualifying? could she be qualifying? could we be qualifying? could you be qualifying? could they be qualifying?
Perfect
could I have qualified? could you have qualified? could she have qualified? could we have qualified? could you have qualified? could they have qualified?
V-ing perfect
could I have been qualifying? could you have been qualifying? could she have been qualifying? could we have been qualifying? could you have been qualifying? could they have been qualifying?
Interro-negative form
Simple form
could I not qualify? could you not qualify? could she not qualify? could we not qualify? could you not qualify? could they not qualify?
V-ing form
could I not be qualifying? could you not be qualifying? could she not be qualifying? could we not be qualifying? could you not be qualifying? could they not be qualifying?
Perfect
could I not have qualified? could you not have qualified? could she not have qualified? could we not have qualified? could you not have qualified? could they not have qualified?
V-ing perfect
could I not have been qualifying? could you not have been qualifying? could she not have been qualifying? could we not have been qualifying? could you not have been qualifying? could they not have been qualifying?