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 mustn't crump you mustn't crump he mustn't crump we mustn't crump you mustn't crump they mustn't crump	I mustn't be crumping you mustn't be crumping he mustn't be crumping we mustn't be crumping you mustn't be crumping they mustn't be crumping
Perfect	V-ing perfect
I mustn't have crumped you mustn't have crumped he mustn't have crumped we mustn't have crumped you mustn't have crumped they mustn't have crumped	I mustn't have been crumping you mustn't have been crumping he mustn't have been crumping we mustn't have been crumping you mustn't have been crumping they mustn't 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
mustn't I crump? mustn't you crump? mustn't he crump? mustn't we crump? mustn't you crump? mustn't they crump?	mustn't I be crumping? mustn't you be crumping? mustn't he be crumping? mustn't we be crumping? mustn't you be crumping? mustn't they be crumping?
Perfect	V-ing perfect
mustn't I have crumped? mustn't you have crumped? mustn't he have crumped? mustn't we have crumped? mustn't you have crumped? mustn't they have crumped?	mustn't I have been crumping? mustn't you have been crumping? mustn't he have been crumping? mustn't we have been crumping? mustn't you have been crumping? mustn't they have been crumping?