English verb conjugation
MUST STUMP

Regular verb: stump - stumped - stumped

Affirmation

Simple form	V-ing form
I must stump you must stump she must stump we must stump you must stump they must stump	I must be stumping you must be stumping she 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 she 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 she 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 she 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 she 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 she 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 she 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 she stump? must we stump? must you stump? must they stump?	must I be stumping? must you be stumping? must she 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 she 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 she 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 she 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 she 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 she 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 she have been stumping? mustn't we have been stumping? mustn't you have been stumping? mustn't they have been stumping?