Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I must celebrate celebrate you must celebrate celebrate she must celebrate celebrate we must celebrate celebrate you must celebrate celebrate they must celebrate celebrate
V-ing form
I must be celebrate celebrating you must be celebrate celebrating she must be celebrate celebrating we must be celebrate celebrating you must be celebrate celebrating they must be celebrate celebrating
Perfect
I must have celebrate celebrated you must have celebrate celebrated she must have celebrate celebrated we must have celebrate celebrated you must have celebrate celebrated they must have celebrate celebrated
V-ing perfect
I must have been celebrate celebrating you must have been celebrate celebrating she must have been celebrate celebrating we must have been celebrate celebrating you must have been celebrate celebrating they must have been celebrate celebrating
Negation
Simple form
I must not celebrate celebrate you must not celebrate celebrate she must not celebrate celebrate we must not celebrate celebrate you must not celebrate celebrate they must not celebrate celebrate
V-ing form
I must not be celebrate celebrating you must not be celebrate celebrating she must not be celebrate celebrating we must not be celebrate celebrating you must not be celebrate celebrating they must not be celebrate celebrating
Perfect
I must not have celebrate celebrated you must not have celebrate celebrated she must not have celebrate celebrated we must not have celebrate celebrated you must not have celebrate celebrated they must not have celebrate celebrated
V-ing perfect
I must not have been celebrate celebrating you must not have been celebrate celebrating she must not have been celebrate celebrating we must not have been celebrate celebrating you must not have been celebrate celebrating they must not have been celebrate celebrating
Interrogative form
Simple form
must I celebrate celebrate? must you celebrate celebrate? must she celebrate celebrate? must we celebrate celebrate? must you celebrate celebrate? must they celebrate celebrate?
V-ing form
must I be celebrate celebrating? must you be celebrate celebrating? must she be celebrate celebrating? must we be celebrate celebrating? must you be celebrate celebrating? must they be celebrate celebrating?
Perfect
must I have celebrate celebrated? must you have celebrate celebrated? must she have celebrate celebrated? must we have celebrate celebrated? must you have celebrate celebrated? must they have celebrate celebrated?
V-ing perfect
must I have been celebrate celebrating? must you have been celebrate celebrating? must she have been celebrate celebrating? must we have been celebrate celebrating? must you have been celebrate celebrating? must they have been celebrate celebrating?
Interro-negative form
Simple form
must I not celebrate celebrate? must you not celebrate celebrate? must she not celebrate celebrate? must we not celebrate celebrate? must you not celebrate celebrate? must they not celebrate celebrate?
V-ing form
must I not be celebrate celebrating? must you not be celebrate celebrating? must she not be celebrate celebrating? must we not be celebrate celebrating? must you not be celebrate celebrating? must they not be celebrate celebrating?
Perfect
must I not have celebrate celebrated? must you not have celebrate celebrated? must she not have celebrate celebrated? must we not have celebrate celebrated? must you not have celebrate celebrated? must they not have celebrate celebrated?
V-ing perfect
must I not have been celebrate celebrating? must you not have been celebrate celebrating? must she not have been celebrate celebrating? must we not have been celebrate celebrating? must you not have been celebrate celebrating? must they not have been celebrate celebrating?