English verb conjugation
MUST DEVELOP

Regular verb: develop - developed - developed

Affirmation

Simple form	V-ing form
I must develop you must develop he must develop we must develop you must develop they must develop	I must be developing you must be developing he must be developing we must be developing you must be developing they must be developing
Perfect	V-ing perfect
I must have developed you must have developed he must have developed we must have developed you must have developed they must have developed	I must have been developing you must have been developing he must have been developing we must have been developing you must have been developing they must have been developing

Negation

Simple form	V-ing form
I must not develop you must not develop he must not develop we must not develop you must not develop they must not develop	I must not be developing you must not be developing he must not be developing we must not be developing you must not be developing they must not be developing
Perfect	V-ing perfect
I must not have developed you must not have developed he must not have developed we must not have developed you must not have developed they must not have developed	I must not have been developing you must not have been developing he must not have been developing we must not have been developing you must not have been developing they must not have been developing

Interrogative form

Simple form	V-ing form
must I develop? must you develop? must he develop? must we develop? must you develop? must they develop?	must I be developing? must you be developing? must he be developing? must we be developing? must you be developing? must they be developing?
Perfect	V-ing perfect
must I have developed? must you have developed? must he have developed? must we have developed? must you have developed? must they have developed?	must I have been developing? must you have been developing? must he have been developing? must we have been developing? must you have been developing? must they have been developing?

Interro-negative form

Simple form	V-ing form
must I not develop? must you not develop? must he not develop? must we not develop? must you not develop? must they not develop?	must I not be developing? must you not be developing? must he not be developing? must we not be developing? must you not be developing? must they not be developing?
Perfect	V-ing perfect
must I not have developed? must you not have developed? must he not have developed? must we not have developed? must you not have developed? must they not have developed?	must I not have been developing? must you not have been developing? must he not have been developing? must we not have been developing? must you not have been developing? must they not have been developing?