I could reform you could reform she could reform we could reform you could reform they could reform
V-ing form
I could be reforming you could be reforming she could be reforming we could be reforming you could be reforming they could be reforming
Perfect
I could have reformed you could have reformed she could have reformed we could have reformed you could have reformed they could have reformed
V-ing perfect
I could have been reforming you could have been reforming she could have been reforming we could have been reforming you could have been reforming they could have been reforming
Negation
Simple form
I could not reform you could not reform she could not reform we could not reform you could not reform they could not reform
V-ing form
I could not be reforming you could not be reforming she could not be reforming we could not be reforming you could not be reforming they could not be reforming
Perfect
I could not have reformed you could not have reformed she could not have reformed we could not have reformed you could not have reformed they could not have reformed
V-ing perfect
I could not have been reforming you could not have been reforming she could not have been reforming we could not have been reforming you could not have been reforming they could not have been reforming
Interrogative form
Simple form
could I reform? could you reform? could she reform? could we reform? could you reform? could they reform?
V-ing form
could I be reforming? could you be reforming? could she be reforming? could we be reforming? could you be reforming? could they be reforming?
Perfect
could I have reformed? could you have reformed? could she have reformed? could we have reformed? could you have reformed? could they have reformed?
V-ing perfect
could I have been reforming? could you have been reforming? could she have been reforming? could we have been reforming? could you have been reforming? could they have been reforming?
Interro-negative form
Simple form
could I not reform? could you not reform? could she not reform? could we not reform? could you not reform? could they not reform?
V-ing form
could I not be reforming? could you not be reforming? could she not be reforming? could we not be reforming? could you not be reforming? could they not be reforming?
Perfect
could I not have reformed? could you not have reformed? could she not have reformed? could we not have reformed? could you not have reformed? could they not have reformed?
V-ing perfect
could I not have been reforming? could you not have been reforming? could she not have been reforming? could we not have been reforming? could you not have been reforming? could they not have been reforming?