English verb conjugation
MUST HUM

Regular verb: hum - humed - humed

Affirmation

Simple form	V-ing form
I must hum you must hum he must hum we must hum you must hum they must hum	I must be huming you must be huming he must be huming we must be huming you must be huming they must be huming
Perfect	V-ing perfect
I must have humed you must have humed he must have humed we must have humed you must have humed they must have humed	I must have been huming you must have been huming he must have been huming we must have been huming you must have been huming they must have been huming

Negation

Simple form	V-ing form
I mustn't hum you mustn't hum he mustn't hum we mustn't hum you mustn't hum they mustn't hum	I mustn't be huming you mustn't be huming he mustn't be huming we mustn't be huming you mustn't be huming they mustn't be huming
Perfect	V-ing perfect
I mustn't have humed you mustn't have humed he mustn't have humed we mustn't have humed you mustn't have humed they mustn't have humed	I mustn't have been huming you mustn't have been huming he mustn't have been huming we mustn't have been huming you mustn't have been huming they mustn't have been huming

Interrogative form

Simple form	V-ing form
must I hum? must you hum? must he hum? must we hum? must you hum? must they hum?	must I be huming? must you be huming? must he be huming? must we be huming? must you be huming? must they be huming?
Perfect	V-ing perfect
must I have humed? must you have humed? must he have humed? must we have humed? must you have humed? must they have humed?	must I have been huming? must you have been huming? must he have been huming? must we have been huming? must you have been huming? must they have been huming?

Interro-negative form

Simple form	V-ing form
mustn't I hum? mustn't you hum? mustn't he hum? mustn't we hum? mustn't you hum? mustn't they hum?	mustn't I be huming? mustn't you be huming? mustn't he be huming? mustn't we be huming? mustn't you be huming? mustn't they be huming?
Perfect	V-ing perfect
mustn't I have humed? mustn't you have humed? mustn't he have humed? mustn't we have humed? mustn't you have humed? mustn't they have humed?	mustn't I have been huming? mustn't you have been huming? mustn't he have been huming? mustn't we have been huming? mustn't you have been huming? mustn't they have been huming?