English verb conjugation
MUST SCALE

Regular verb: scale - scaled - scaled

Affirmation

Simple form	V-ing form
I must scale you must scale he must scale we must scale you must scale they must scale	I must be scaling you must be scaling he must be scaling we must be scaling you must be scaling they must be scaling
Perfect	V-ing perfect
I must have scaled you must have scaled he must have scaled we must have scaled you must have scaled they must have scaled	I must have been scaling you must have been scaling he must have been scaling we must have been scaling you must have been scaling they must have been scaling

Negation

Simple form	V-ing form
I must not scale you must not scale he must not scale we must not scale you must not scale they must not scale	I must not be scaling you must not be scaling he must not be scaling we must not be scaling you must not be scaling they must not be scaling
Perfect	V-ing perfect
I must not have scaled you must not have scaled he must not have scaled we must not have scaled you must not have scaled they must not have scaled	I must not have been scaling you must not have been scaling he must not have been scaling we must not have been scaling you must not have been scaling they must not have been scaling

Interrogative form

Simple form	V-ing form
must I scale? must you scale? must he scale? must we scale? must you scale? must they scale?	must I be scaling? must you be scaling? must he be scaling? must we be scaling? must you be scaling? must they be scaling?
Perfect	V-ing perfect
must I have scaled? must you have scaled? must he have scaled? must we have scaled? must you have scaled? must they have scaled?	must I have been scaling? must you have been scaling? must he have been scaling? must we have been scaling? must you have been scaling? must they have been scaling?

Interro-negative form

Simple form	V-ing form
must I not scale? must you not scale? must he not scale? must we not scale? must you not scale? must they not scale?	must I not be scaling? must you not be scaling? must he not be scaling? must we not be scaling? must you not be scaling? must they not be scaling?
Perfect	V-ing perfect
must I not have scaled? must you not have scaled? must he not have scaled? must we not have scaled? must you not have scaled? must they not have scaled?	must I not have been scaling? must you not have been scaling? must he not have been scaling? must we not have been scaling? must you not have been scaling? must they not have been scaling?