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