English verb conjugation
MUST STUMP

Regular verb: stump - stumped - stumped

Affirmation

Simple form	V-ing form
I must stump you must stump he must stump we must stump you must stump they must stump	I must be stumping you must be stumping he must be stumping we must be stumping you must be stumping they must be stumping
Perfect	V-ing perfect
I must have stumped you must have stumped he must have stumped we must have stumped you must have stumped they must have stumped	I must have been stumping you must have been stumping he must have been stumping we must have been stumping you must have been stumping they must have been stumping

Negation

Simple form	V-ing form
I mustn't stump you mustn't stump he mustn't stump we mustn't stump you mustn't stump they mustn't stump	I mustn't be stumping you mustn't be stumping he mustn't be stumping we mustn't be stumping you mustn't be stumping they mustn't be stumping
Perfect	V-ing perfect
I mustn't have stumped you mustn't have stumped he mustn't have stumped we mustn't have stumped you mustn't have stumped they mustn't have stumped	I mustn't have been stumping you mustn't have been stumping he mustn't have been stumping we mustn't have been stumping you mustn't have been stumping they mustn't have been stumping

Interrogative form

Simple form	V-ing form
must I stump? must you stump? must he stump? must we stump? must you stump? must they stump?	must I be stumping? must you be stumping? must he be stumping? must we be stumping? must you be stumping? must they be stumping?
Perfect	V-ing perfect
must I have stumped? must you have stumped? must he have stumped? must we have stumped? must you have stumped? must they have stumped?	must I have been stumping? must you have been stumping? must he have been stumping? must we have been stumping? must you have been stumping? must they have been stumping?

Interro-negative form

Simple form	V-ing form
mustn't I stump? mustn't you stump? mustn't he stump? mustn't we stump? mustn't you stump? mustn't they stump?	mustn't I be stumping? mustn't you be stumping? mustn't he be stumping? mustn't we be stumping? mustn't you be stumping? mustn't they be stumping?
Perfect	V-ing perfect
mustn't I have stumped? mustn't you have stumped? mustn't he have stumped? mustn't we have stumped? mustn't you have stumped? mustn't they have stumped?	mustn't I have been stumping? mustn't you have been stumping? mustn't he have been stumping? mustn't we have been stumping? mustn't you have been stumping? mustn't they have been stumping?