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 mustn't grapple you mustn't grapple he mustn't grapple we mustn't grapple you mustn't grapple they mustn't grapple	I mustn't be grappling you mustn't be grappling he mustn't be grappling we mustn't be grappling you mustn't be grappling they mustn't be grappling
Perfect	V-ing perfect
I mustn't have grappled you mustn't have grappled he mustn't have grappled we mustn't have grappled you mustn't have grappled they mustn't have grappled	I mustn't have been grappling you mustn't have been grappling he mustn't have been grappling we mustn't have been grappling you mustn't have been grappling they mustn't 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
mustn't I grapple? mustn't you grapple? mustn't he grapple? mustn't we grapple? mustn't you grapple? mustn't they grapple?	mustn't I be grappling? mustn't you be grappling? mustn't he be grappling? mustn't we be grappling? mustn't you be grappling? mustn't they be grappling?
Perfect	V-ing perfect
mustn't I have grappled? mustn't you have grappled? mustn't he have grappled? mustn't we have grappled? mustn't you have grappled? mustn't they have grappled?	mustn't I have been grappling? mustn't you have been grappling? mustn't he have been grappling? mustn't we have been grappling? mustn't you have been grappling? mustn't they have been grappling?