English verb conjugation
MUST SHADOWBOX

Regular verb: shadowbox - shadowboxed - shadowboxed

Affirmation

Simple form	V-ing form
I must shadowbox you must shadowbox he must shadowbox we must shadowbox you must shadowbox they must shadowbox	I must be shadowboxing you must be shadowboxing he must be shadowboxing we must be shadowboxing you must be shadowboxing they must be shadowboxing
Perfect	V-ing perfect
I must have shadowboxed you must have shadowboxed he must have shadowboxed we must have shadowboxed you must have shadowboxed they must have shadowboxed	I must have been shadowboxing you must have been shadowboxing he must have been shadowboxing we must have been shadowboxing you must have been shadowboxing they must have been shadowboxing

Negation

Simple form	V-ing form
I mustn't shadowbox you mustn't shadowbox he mustn't shadowbox we mustn't shadowbox you mustn't shadowbox they mustn't shadowbox	I mustn't be shadowboxing you mustn't be shadowboxing he mustn't be shadowboxing we mustn't be shadowboxing you mustn't be shadowboxing they mustn't be shadowboxing
Perfect	V-ing perfect
I mustn't have shadowboxed you mustn't have shadowboxed he mustn't have shadowboxed we mustn't have shadowboxed you mustn't have shadowboxed they mustn't have shadowboxed	I mustn't have been shadowboxing you mustn't have been shadowboxing he mustn't have been shadowboxing we mustn't have been shadowboxing you mustn't have been shadowboxing they mustn't have been shadowboxing

Interrogative form

Simple form	V-ing form
must I shadowbox? must you shadowbox? must he shadowbox? must we shadowbox? must you shadowbox? must they shadowbox?	must I be shadowboxing? must you be shadowboxing? must he be shadowboxing? must we be shadowboxing? must you be shadowboxing? must they be shadowboxing?
Perfect	V-ing perfect
must I have shadowboxed? must you have shadowboxed? must he have shadowboxed? must we have shadowboxed? must you have shadowboxed? must they have shadowboxed?	must I have been shadowboxing? must you have been shadowboxing? must he have been shadowboxing? must we have been shadowboxing? must you have been shadowboxing? must they have been shadowboxing?

Interro-negative form

Simple form	V-ing form
mustn't I shadowbox? mustn't you shadowbox? mustn't he shadowbox? mustn't we shadowbox? mustn't you shadowbox? mustn't they shadowbox?	mustn't I be shadowboxing? mustn't you be shadowboxing? mustn't he be shadowboxing? mustn't we be shadowboxing? mustn't you be shadowboxing? mustn't they be shadowboxing?
Perfect	V-ing perfect
mustn't I have shadowboxed? mustn't you have shadowboxed? mustn't he have shadowboxed? mustn't we have shadowboxed? mustn't you have shadowboxed? mustn't they have shadowboxed?	mustn't I have been shadowboxing? mustn't you have been shadowboxing? mustn't he have been shadowboxing? mustn't we have been shadowboxing? mustn't you have been shadowboxing? mustn't they have been shadowboxing?