English verb conjugation
MUST UNBOX

Regular verb: unbox - unboxed - unboxed

Affirmation

Simple form	V-ing form
I must unbox you must unbox he must unbox we must unbox you must unbox they must unbox	I must be unboxing you must be unboxing he must be unboxing we must be unboxing you must be unboxing they must be unboxing
Perfect	V-ing perfect
I must have unboxed you must have unboxed he must have unboxed we must have unboxed you must have unboxed they must have unboxed	I must have been unboxing you must have been unboxing he must have been unboxing we must have been unboxing you must have been unboxing they must have been unboxing

Negation

Simple form	V-ing form
I mustn't unbox you mustn't unbox he mustn't unbox we mustn't unbox you mustn't unbox they mustn't unbox	I mustn't be unboxing you mustn't be unboxing he mustn't be unboxing we mustn't be unboxing you mustn't be unboxing they mustn't be unboxing
Perfect	V-ing perfect
I mustn't have unboxed you mustn't have unboxed he mustn't have unboxed we mustn't have unboxed you mustn't have unboxed they mustn't have unboxed	I mustn't have been unboxing you mustn't have been unboxing he mustn't have been unboxing we mustn't have been unboxing you mustn't have been unboxing they mustn't have been unboxing

Interrogative form

Simple form	V-ing form
must I unbox? must you unbox? must he unbox? must we unbox? must you unbox? must they unbox?	must I be unboxing? must you be unboxing? must he be unboxing? must we be unboxing? must you be unboxing? must they be unboxing?
Perfect	V-ing perfect
must I have unboxed? must you have unboxed? must he have unboxed? must we have unboxed? must you have unboxed? must they have unboxed?	must I have been unboxing? must you have been unboxing? must he have been unboxing? must we have been unboxing? must you have been unboxing? must they have been unboxing?

Interro-negative form

Simple form	V-ing form
mustn't I unbox? mustn't you unbox? mustn't he unbox? mustn't we unbox? mustn't you unbox? mustn't they unbox?	mustn't I be unboxing? mustn't you be unboxing? mustn't he be unboxing? mustn't we be unboxing? mustn't you be unboxing? mustn't they be unboxing?
Perfect	V-ing perfect
mustn't I have unboxed? mustn't you have unboxed? mustn't he have unboxed? mustn't we have unboxed? mustn't you have unboxed? mustn't they have unboxed?	mustn't I have been unboxing? mustn't you have been unboxing? mustn't he have been unboxing? mustn't we have been unboxing? mustn't you have been unboxing? mustn't they have been unboxing?