English verb conjugation
MUST CRUMPLE CRUMPLE

Regular verb: crumple crumple - crumple crumpled - crumple crumpled

Warning, this verb may not exist. Conjugation is given as example.

Affirmation

Simple form	V-ing form
I must crumple crumple you must crumple crumple he must crumple crumple we must crumple crumple you must crumple crumple they must crumple crumple	I must be crumple crumpling you must be crumple crumpling he must be crumple crumpling we must be crumple crumpling you must be crumple crumpling they must be crumple crumpling
Perfect	V-ing perfect
I must have crumple crumpled you must have crumple crumpled he must have crumple crumpled we must have crumple crumpled you must have crumple crumpled they must have crumple crumpled	I must have been crumple crumpling you must have been crumple crumpling he must have been crumple crumpling we must have been crumple crumpling you must have been crumple crumpling they must have been crumple crumpling

Negation

Simple form	V-ing form
I must not crumple crumple you must not crumple crumple he must not crumple crumple we must not crumple crumple you must not crumple crumple they must not crumple crumple	I must not be crumple crumpling you must not be crumple crumpling he must not be crumple crumpling we must not be crumple crumpling you must not be crumple crumpling they must not be crumple crumpling
Perfect	V-ing perfect
I must not have crumple crumpled you must not have crumple crumpled he must not have crumple crumpled we must not have crumple crumpled you must not have crumple crumpled they must not have crumple crumpled	I must not have been crumple crumpling you must not have been crumple crumpling he must not have been crumple crumpling we must not have been crumple crumpling you must not have been crumple crumpling they must not have been crumple crumpling

Interrogative form

Simple form	V-ing form
must I crumple crumple? must you crumple crumple? must he crumple crumple? must we crumple crumple? must you crumple crumple? must they crumple crumple?	must I be crumple crumpling? must you be crumple crumpling? must he be crumple crumpling? must we be crumple crumpling? must you be crumple crumpling? must they be crumple crumpling?
Perfect	V-ing perfect
must I have crumple crumpled? must you have crumple crumpled? must he have crumple crumpled? must we have crumple crumpled? must you have crumple crumpled? must they have crumple crumpled?	must I have been crumple crumpling? must you have been crumple crumpling? must he have been crumple crumpling? must we have been crumple crumpling? must you have been crumple crumpling? must they have been crumple crumpling?

Interro-negative form

Simple form	V-ing form
must I not crumple crumple? must you not crumple crumple? must he not crumple crumple? must we not crumple crumple? must you not crumple crumple? must they not crumple crumple?	must I not be crumple crumpling? must you not be crumple crumpling? must he not be crumple crumpling? must we not be crumple crumpling? must you not be crumple crumpling? must they not be crumple crumpling?
Perfect	V-ing perfect
must I not have crumple crumpled? must you not have crumple crumpled? must he not have crumple crumpled? must we not have crumple crumpled? must you not have crumple crumpled? must they not have crumple crumpled?	must I not have been crumple crumpling? must you not have been crumple crumpling? must he not have been crumple crumpling? must we not have been crumple crumpling? must you not have been crumple crumpling? must they not have been crumple crumpling?