English verb conjugation
MUST FOX

Regular verb: fox - foxed - foxed

Affirmation

Simple form	V-ing form
I must fox you must fox he must fox we must fox you must fox they must fox	I must be foxing you must be foxing he must be foxing we must be foxing you must be foxing they must be foxing
Perfect	V-ing perfect
I must have foxed you must have foxed he must have foxed we must have foxed you must have foxed they must have foxed	I must have been foxing you must have been foxing he must have been foxing we must have been foxing you must have been foxing they must have been foxing

Negation

Simple form	V-ing form
I mustn't fox you mustn't fox he mustn't fox we mustn't fox you mustn't fox they mustn't fox	I mustn't be foxing you mustn't be foxing he mustn't be foxing we mustn't be foxing you mustn't be foxing they mustn't be foxing
Perfect	V-ing perfect
I mustn't have foxed you mustn't have foxed he mustn't have foxed we mustn't have foxed you mustn't have foxed they mustn't have foxed	I mustn't have been foxing you mustn't have been foxing he mustn't have been foxing we mustn't have been foxing you mustn't have been foxing they mustn't have been foxing

Interrogative form

Simple form	V-ing form
must I fox? must you fox? must he fox? must we fox? must you fox? must they fox?	must I be foxing? must you be foxing? must he be foxing? must we be foxing? must you be foxing? must they be foxing?
Perfect	V-ing perfect
must I have foxed? must you have foxed? must he have foxed? must we have foxed? must you have foxed? must they have foxed?	must I have been foxing? must you have been foxing? must he have been foxing? must we have been foxing? must you have been foxing? must they have been foxing?

Interro-negative form

Simple form	V-ing form
mustn't I fox? mustn't you fox? mustn't he fox? mustn't we fox? mustn't you fox? mustn't they fox?	mustn't I be foxing? mustn't you be foxing? mustn't he be foxing? mustn't we be foxing? mustn't you be foxing? mustn't they be foxing?
Perfect	V-ing perfect
mustn't I have foxed? mustn't you have foxed? mustn't he have foxed? mustn't we have foxed? mustn't you have foxed? mustn't they have foxed?	mustn't I have been foxing? mustn't you have been foxing? mustn't he have been foxing? mustn't we have been foxing? mustn't you have been foxing? mustn't they have been foxing?