English verb conjugation
MUST COX

Regular verb: cox - coxed - coxed

Affirmation

Simple form	V-ing form
I must cox you must cox he must cox we must cox you must cox they must cox	I must be coxing you must be coxing he must be coxing we must be coxing you must be coxing they must be coxing
Perfect	V-ing perfect
I must have coxed you must have coxed he must have coxed we must have coxed you must have coxed they must have coxed	I must have been coxing you must have been coxing he must have been coxing we must have been coxing you must have been coxing they must have been coxing

Negation

Simple form	V-ing form
I mustn't cox you mustn't cox he mustn't cox we mustn't cox you mustn't cox they mustn't cox	I mustn't be coxing you mustn't be coxing he mustn't be coxing we mustn't be coxing you mustn't be coxing they mustn't be coxing
Perfect	V-ing perfect
I mustn't have coxed you mustn't have coxed he mustn't have coxed we mustn't have coxed you mustn't have coxed they mustn't have coxed	I mustn't have been coxing you mustn't have been coxing he mustn't have been coxing we mustn't have been coxing you mustn't have been coxing they mustn't have been coxing

Interrogative form

Simple form	V-ing form
must I cox? must you cox? must he cox? must we cox? must you cox? must they cox?	must I be coxing? must you be coxing? must he be coxing? must we be coxing? must you be coxing? must they be coxing?
Perfect	V-ing perfect
must I have coxed? must you have coxed? must he have coxed? must we have coxed? must you have coxed? must they have coxed?	must I have been coxing? must you have been coxing? must he have been coxing? must we have been coxing? must you have been coxing? must they have been coxing?

Interro-negative form

Simple form	V-ing form
mustn't I cox? mustn't you cox? mustn't he cox? mustn't we cox? mustn't you cox? mustn't they cox?	mustn't I be coxing? mustn't you be coxing? mustn't he be coxing? mustn't we be coxing? mustn't you be coxing? mustn't they be coxing?
Perfect	V-ing perfect
mustn't I have coxed? mustn't you have coxed? mustn't he have coxed? mustn't we have coxed? mustn't you have coxed? mustn't they have coxed?	mustn't I have been coxing? mustn't you have been coxing? mustn't he have been coxing? mustn't we have been coxing? mustn't you have been coxing? mustn't they have been coxing?