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