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 must not stump you must not stump he must not stump we must not stump you must not stump they must not stump	I must not be stumping you must not be stumping he must not be stumping we must not be stumping you must not be stumping they must not be stumping
Perfect	V-ing perfect
I must not have stumped you must not have stumped he must not have stumped we must not have stumped you must not have stumped they must not have stumped	I must not have been stumping you must not have been stumping he must not have been stumping we must not have been stumping you must not have been stumping they must not 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
must I not stump? must you not stump? must he not stump? must we not stump? must you not stump? must they not stump?	must I not be stumping? must you not be stumping? must he not be stumping? must we not be stumping? must you not be stumping? must they not be stumping?
Perfect	V-ing perfect
must I not have stumped? must you not have stumped? must he not have stumped? must we not have stumped? must you not have stumped? must they not have stumped?	must I not have been stumping? must you not have been stumping? must he not have been stumping? must we not have been stumping? must you not have been stumping? must they not have been stumping?