English verb conjugation
MUST GRAPPLE

Regular verb: grapple - grappled - grappled

Affirmation

Simple form	V-ing form
I must grapple you must grapple he must grapple we must grapple you must grapple they must grapple	I must be grappling you must be grappling he must be grappling we must be grappling you must be grappling they must be grappling
Perfect	V-ing perfect
I must have grappled you must have grappled he must have grappled we must have grappled you must have grappled they must have grappled	I must have been grappling you must have been grappling he must have been grappling we must have been grappling you must have been grappling they must have been grappling

Negation

Simple form	V-ing form
I must not grapple you must not grapple he must not grapple we must not grapple you must not grapple they must not grapple	I must not be grappling you must not be grappling he must not be grappling we must not be grappling you must not be grappling they must not be grappling
Perfect	V-ing perfect
I must not have grappled you must not have grappled he must not have grappled we must not have grappled you must not have grappled they must not have grappled	I must not have been grappling you must not have been grappling he must not have been grappling we must not have been grappling you must not have been grappling they must not have been grappling

Interrogative form

Simple form	V-ing form
must I grapple? must you grapple? must he grapple? must we grapple? must you grapple? must they grapple?	must I be grappling? must you be grappling? must he be grappling? must we be grappling? must you be grappling? must they be grappling?
Perfect	V-ing perfect
must I have grappled? must you have grappled? must he have grappled? must we have grappled? must you have grappled? must they have grappled?	must I have been grappling? must you have been grappling? must he have been grappling? must we have been grappling? must you have been grappling? must they have been grappling?

Interro-negative form

Simple form	V-ing form
must I not grapple? must you not grapple? must he not grapple? must we not grapple? must you not grapple? must they not grapple?	must I not be grappling? must you not be grappling? must he not be grappling? must we not be grappling? must you not be grappling? must they not be grappling?
Perfect	V-ing perfect
must I not have grappled? must you not have grappled? must he not have grappled? must we not have grappled? must you not have grappled? must they not have grappled?	must I not have been grappling? must you not have been grappling? must he not have been grappling? must we not have been grappling? must you not have been grappling? must they not have been grappling?