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