English verb conjugation
MUST CHUM

Regular verb: chum - chummed - chummed

Affirmation

Simple form	V-ing form
I must chum you must chum he must chum we must chum you must chum they must chum	I must be chumming you must be chumming he must be chumming we must be chumming you must be chumming they must be chumming
Perfect	V-ing perfect
I must have chummed you must have chummed he must have chummed we must have chummed you must have chummed they must have chummed	I must have been chumming you must have been chumming he must have been chumming we must have been chumming you must have been chumming they must have been chumming

Negation

Simple form	V-ing form
I mustn't chum you mustn't chum he mustn't chum we mustn't chum you mustn't chum they mustn't chum	I mustn't be chumming you mustn't be chumming he mustn't be chumming we mustn't be chumming you mustn't be chumming they mustn't be chumming
Perfect	V-ing perfect
I mustn't have chummed you mustn't have chummed he mustn't have chummed we mustn't have chummed you mustn't have chummed they mustn't have chummed	I mustn't have been chumming you mustn't have been chumming he mustn't have been chumming we mustn't have been chumming you mustn't have been chumming they mustn't have been chumming

Interrogative form

Simple form	V-ing form
must I chum? must you chum? must he chum? must we chum? must you chum? must they chum?	must I be chumming? must you be chumming? must he be chumming? must we be chumming? must you be chumming? must they be chumming?
Perfect	V-ing perfect
must I have chummed? must you have chummed? must he have chummed? must we have chummed? must you have chummed? must they have chummed?	must I have been chumming? must you have been chumming? must he have been chumming? must we have been chumming? must you have been chumming? must they have been chumming?

Interro-negative form

Simple form	V-ing form
mustn't I chum? mustn't you chum? mustn't he chum? mustn't we chum? mustn't you chum? mustn't they chum?	mustn't I be chumming? mustn't you be chumming? mustn't he be chumming? mustn't we be chumming? mustn't you be chumming? mustn't they be chumming?
Perfect	V-ing perfect
mustn't I have chummed? mustn't you have chummed? mustn't he have chummed? mustn't we have chummed? mustn't you have chummed? mustn't they have chummed?	mustn't I have been chumming? mustn't you have been chumming? mustn't he have been chumming? mustn't we have been chumming? mustn't you have been chumming? mustn't they have been chumming?