English verb conjugation
MUST PREEXCHANGE

Regular verb: preexchange - preexchanged - preexchanged

Affirmation

Simple form	V-ing form
I must preexchange you must preexchange he must preexchange we must preexchange you must preexchange they must preexchange	I must be preexchanging you must be preexchanging he must be preexchanging we must be preexchanging you must be preexchanging they must be preexchanging
Perfect	V-ing perfect
I must have preexchanged you must have preexchanged he must have preexchanged we must have preexchanged you must have preexchanged they must have preexchanged	I must have been preexchanging you must have been preexchanging he must have been preexchanging we must have been preexchanging you must have been preexchanging they must have been preexchanging

Negation

Simple form	V-ing form
I must not preexchange you must not preexchange he must not preexchange we must not preexchange you must not preexchange they must not preexchange	I must not be preexchanging you must not be preexchanging he must not be preexchanging we must not be preexchanging you must not be preexchanging they must not be preexchanging
Perfect	V-ing perfect
I must not have preexchanged you must not have preexchanged he must not have preexchanged we must not have preexchanged you must not have preexchanged they must not have preexchanged	I must not have been preexchanging you must not have been preexchanging he must not have been preexchanging we must not have been preexchanging you must not have been preexchanging they must not have been preexchanging

Interrogative form

Simple form	V-ing form
must I preexchange? must you preexchange? must he preexchange? must we preexchange? must you preexchange? must they preexchange?	must I be preexchanging? must you be preexchanging? must he be preexchanging? must we be preexchanging? must you be preexchanging? must they be preexchanging?
Perfect	V-ing perfect
must I have preexchanged? must you have preexchanged? must he have preexchanged? must we have preexchanged? must you have preexchanged? must they have preexchanged?	must I have been preexchanging? must you have been preexchanging? must he have been preexchanging? must we have been preexchanging? must you have been preexchanging? must they have been preexchanging?

Interro-negative form

Simple form	V-ing form
must I not preexchange? must you not preexchange? must he not preexchange? must we not preexchange? must you not preexchange? must they not preexchange?	must I not be preexchanging? must you not be preexchanging? must he not be preexchanging? must we not be preexchanging? must you not be preexchanging? must they not be preexchanging?
Perfect	V-ing perfect
must I not have preexchanged? must you not have preexchanged? must he not have preexchanged? must we not have preexchanged? must you not have preexchanged? must they not have preexchanged?	must I not have been preexchanging? must you not have been preexchanging? must he not have been preexchanging? must we not have been preexchanging? must you not have been preexchanging? must they not have been preexchanging?