English verb conjugation
MUST OBSOLESCE

Regular verb: obsolesce - obsolesced - obsolesced

Affirmation

Simple form	V-ing form
I must obsolesce you must obsolesce he must obsolesce we must obsolesce you must obsolesce they must obsolesce	I must be obsolescing you must be obsolescing he must be obsolescing we must be obsolescing you must be obsolescing they must be obsolescing
Perfect	V-ing perfect
I must have obsolesced you must have obsolesced he must have obsolesced we must have obsolesced you must have obsolesced they must have obsolesced	I must have been obsolescing you must have been obsolescing he must have been obsolescing we must have been obsolescing you must have been obsolescing they must have been obsolescing

Negation

Simple form	V-ing form
I must not obsolesce you must not obsolesce he must not obsolesce we must not obsolesce you must not obsolesce they must not obsolesce	I must not be obsolescing you must not be obsolescing he must not be obsolescing we must not be obsolescing you must not be obsolescing they must not be obsolescing
Perfect	V-ing perfect
I must not have obsolesced you must not have obsolesced he must not have obsolesced we must not have obsolesced you must not have obsolesced they must not have obsolesced	I must not have been obsolescing you must not have been obsolescing he must not have been obsolescing we must not have been obsolescing you must not have been obsolescing they must not have been obsolescing

Interrogative form

Simple form	V-ing form
must I obsolesce? must you obsolesce? must he obsolesce? must we obsolesce? must you obsolesce? must they obsolesce?	must I be obsolescing? must you be obsolescing? must he be obsolescing? must we be obsolescing? must you be obsolescing? must they be obsolescing?
Perfect	V-ing perfect
must I have obsolesced? must you have obsolesced? must he have obsolesced? must we have obsolesced? must you have obsolesced? must they have obsolesced?	must I have been obsolescing? must you have been obsolescing? must he have been obsolescing? must we have been obsolescing? must you have been obsolescing? must they have been obsolescing?

Interro-negative form

Simple form	V-ing form
must I not obsolesce? must you not obsolesce? must he not obsolesce? must we not obsolesce? must you not obsolesce? must they not obsolesce?	must I not be obsolescing? must you not be obsolescing? must he not be obsolescing? must we not be obsolescing? must you not be obsolescing? must they not be obsolescing?
Perfect	V-ing perfect
must I not have obsolesced? must you not have obsolesced? must he not have obsolesced? must we not have obsolesced? must you not have obsolesced? must they not have obsolesced?	must I not have been obsolescing? must you not have been obsolescing? must he not have been obsolescing? must we not have been obsolescing? must you not have been obsolescing? must they not have been obsolescing?