I could shortchange you could shortchange he could shortchange we could shortchange you could shortchange they could shortchange
V-ing form
I could be shortchanging you could be shortchanging he could be shortchanging we could be shortchanging you could be shortchanging they could be shortchanging
Perfect
I could have shortchanged you could have shortchanged he could have shortchanged we could have shortchanged you could have shortchanged they could have shortchanged
V-ing perfect
I could have been shortchanging you could have been shortchanging he could have been shortchanging we could have been shortchanging you could have been shortchanging they could have been shortchanging
Negation
Simple form
I could not shortchange you could not shortchange he could not shortchange we could not shortchange you could not shortchange they could not shortchange
V-ing form
I could not be shortchanging you could not be shortchanging he could not be shortchanging we could not be shortchanging you could not be shortchanging they could not be shortchanging
Perfect
I could not have shortchanged you could not have shortchanged he could not have shortchanged we could not have shortchanged you could not have shortchanged they could not have shortchanged
V-ing perfect
I could not have been shortchanging you could not have been shortchanging he could not have been shortchanging we could not have been shortchanging you could not have been shortchanging they could not have been shortchanging
Interrogative form
Simple form
could I shortchange? could you shortchange? could he shortchange? could we shortchange? could you shortchange? could they shortchange?
V-ing form
could I be shortchanging? could you be shortchanging? could he be shortchanging? could we be shortchanging? could you be shortchanging? could they be shortchanging?
Perfect
could I have shortchanged? could you have shortchanged? could he have shortchanged? could we have shortchanged? could you have shortchanged? could they have shortchanged?
V-ing perfect
could I have been shortchanging? could you have been shortchanging? could he have been shortchanging? could we have been shortchanging? could you have been shortchanging? could they have been shortchanging?
Interro-negative form
Simple form
could I not shortchange? could you not shortchange? could he not shortchange? could we not shortchange? could you not shortchange? could they not shortchange?
V-ing form
could I not be shortchanging? could you not be shortchanging? could he not be shortchanging? could we not be shortchanging? could you not be shortchanging? could they not be shortchanging?
Perfect
could I not have shortchanged? could you not have shortchanged? could he not have shortchanged? could we not have shortchanged? could you not have shortchanged? could they not have shortchanged?
V-ing perfect
could I not have been shortchanging? could you not have been shortchanging? could he not have been shortchanging? could we not have been shortchanging? could you not have been shortchanging? could they not have been shortchanging?