English verb conjugation
MUST FULFILL

Regular verb: fulfill - fulfilled - fulfilled

Affirmation

Simple form	V-ing form
I must fulfill you must fulfill he must fulfill we must fulfill you must fulfill they must fulfill	I must be fulfilling you must be fulfilling he must be fulfilling we must be fulfilling you must be fulfilling they must be fulfilling
Perfect	V-ing perfect
I must have fulfilled you must have fulfilled he must have fulfilled we must have fulfilled you must have fulfilled they must have fulfilled	I must have been fulfilling you must have been fulfilling he must have been fulfilling we must have been fulfilling you must have been fulfilling they must have been fulfilling

Negation

Simple form	V-ing form
I must not fulfill you must not fulfill he must not fulfill we must not fulfill you must not fulfill they must not fulfill	I must not be fulfilling you must not be fulfilling he must not be fulfilling we must not be fulfilling you must not be fulfilling they must not be fulfilling
Perfect	V-ing perfect
I must not have fulfilled you must not have fulfilled he must not have fulfilled we must not have fulfilled you must not have fulfilled they must not have fulfilled	I must not have been fulfilling you must not have been fulfilling he must not have been fulfilling we must not have been fulfilling you must not have been fulfilling they must not have been fulfilling

Interrogative form

Simple form	V-ing form
must I fulfill? must you fulfill? must he fulfill? must we fulfill? must you fulfill? must they fulfill?	must I be fulfilling? must you be fulfilling? must he be fulfilling? must we be fulfilling? must you be fulfilling? must they be fulfilling?
Perfect	V-ing perfect
must I have fulfilled? must you have fulfilled? must he have fulfilled? must we have fulfilled? must you have fulfilled? must they have fulfilled?	must I have been fulfilling? must you have been fulfilling? must he have been fulfilling? must we have been fulfilling? must you have been fulfilling? must they have been fulfilling?

Interro-negative form

Simple form	V-ing form
must I not fulfill? must you not fulfill? must he not fulfill? must we not fulfill? must you not fulfill? must they not fulfill?	must I not be fulfilling? must you not be fulfilling? must he not be fulfilling? must we not be fulfilling? must you not be fulfilling? must they not be fulfilling?
Perfect	V-ing perfect
must I not have fulfilled? must you not have fulfilled? must he not have fulfilled? must we not have fulfilled? must you not have fulfilled? must they not have fulfilled?	must I not have been fulfilling? must you not have been fulfilling? must he not have been fulfilling? must we not have been fulfilling? must you not have been fulfilling? must they not have been fulfilling?