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