English verb conjugation
MUST CRUMP

Regular verb: crump - crumped - crumped

Affirmation

Simple form	V-ing form
I must crump you must crump he must crump we must crump you must crump they must crump	I must be crumping you must be crumping he must be crumping we must be crumping you must be crumping they must be crumping
Perfect	V-ing perfect
I must have crumped you must have crumped he must have crumped we must have crumped you must have crumped they must have crumped	I must have been crumping you must have been crumping he must have been crumping we must have been crumping you must have been crumping they must have been crumping

Negation

Simple form	V-ing form
I must not crump you must not crump he must not crump we must not crump you must not crump they must not crump	I must not be crumping you must not be crumping he must not be crumping we must not be crumping you must not be crumping they must not be crumping
Perfect	V-ing perfect
I must not have crumped you must not have crumped he must not have crumped we must not have crumped you must not have crumped they must not have crumped	I must not have been crumping you must not have been crumping he must not have been crumping we must not have been crumping you must not have been crumping they must not have been crumping

Interrogative form

Simple form	V-ing form
must I crump? must you crump? must he crump? must we crump? must you crump? must they crump?	must I be crumping? must you be crumping? must he be crumping? must we be crumping? must you be crumping? must they be crumping?
Perfect	V-ing perfect
must I have crumped? must you have crumped? must he have crumped? must we have crumped? must you have crumped? must they have crumped?	must I have been crumping? must you have been crumping? must he have been crumping? must we have been crumping? must you have been crumping? must they have been crumping?

Interro-negative form

Simple form	V-ing form
must I not crump? must you not crump? must he not crump? must we not crump? must you not crump? must they not crump?	must I not be crumping? must you not be crumping? must he not be crumping? must we not be crumping? must you not be crumping? must they not be crumping?
Perfect	V-ing perfect
must I not have crumped? must you not have crumped? must he not have crumped? must we not have crumped? must you not have crumped? must they not have crumped?	must I not have been crumping? must you not have been crumping? must he not have been crumping? must we not have been crumping? must you not have been crumping? must they not have been crumping?