English verb conjugation
MUST WALK

Regular verb: walk - walked - walked

Affirmation

Simple form	V-ing form
I must walk you must walk he must walk we must walk you must walk they must walk	I must be walking you must be walking he must be walking we must be walking you must be walking they must be walking
Perfect	V-ing perfect
I must have walked you must have walked he must have walked we must have walked you must have walked they must have walked	I must have been walking you must have been walking he must have been walking we must have been walking you must have been walking they must have been walking

Negation

Simple form	V-ing form
I mustn't walk you mustn't walk he mustn't walk we mustn't walk you mustn't walk they mustn't walk	I mustn't be walking you mustn't be walking he mustn't be walking we mustn't be walking you mustn't be walking they mustn't be walking
Perfect	V-ing perfect
I mustn't have walked you mustn't have walked he mustn't have walked we mustn't have walked you mustn't have walked they mustn't have walked	I mustn't have been walking you mustn't have been walking he mustn't have been walking we mustn't have been walking you mustn't have been walking they mustn't have been walking

Interrogative form

Simple form	V-ing form
must I walk? must you walk? must he walk? must we walk? must you walk? must they walk?	must I be walking? must you be walking? must he be walking? must we be walking? must you be walking? must they be walking?
Perfect	V-ing perfect
must I have walked? must you have walked? must he have walked? must we have walked? must you have walked? must they have walked?	must I have been walking? must you have been walking? must he have been walking? must we have been walking? must you have been walking? must they have been walking?

Interro-negative form

Simple form	V-ing form
mustn't I walk? mustn't you walk? mustn't he walk? mustn't we walk? mustn't you walk? mustn't they walk?	mustn't I be walking? mustn't you be walking? mustn't he be walking? mustn't we be walking? mustn't you be walking? mustn't they be walking?
Perfect	V-ing perfect
mustn't I have walked? mustn't you have walked? mustn't he have walked? mustn't we have walked? mustn't you have walked? mustn't they have walked?	mustn't I have been walking? mustn't you have been walking? mustn't he have been walking? mustn't we have been walking? mustn't you have been walking? mustn't they have been walking?