English verb conjugation
MUST PERCUSS

Regular verb: percuss - percussed - percussed

Affirmation

Simple form	V-ing form
I must percuss you must percuss he must percuss we must percuss you must percuss they must percuss	I must be percussing you must be percussing he must be percussing we must be percussing you must be percussing they must be percussing
Perfect	V-ing perfect
I must have percussed you must have percussed he must have percussed we must have percussed you must have percussed they must have percussed	I must have been percussing you must have been percussing he must have been percussing we must have been percussing you must have been percussing they must have been percussing

Negation

Simple form	V-ing form
I must not percuss you must not percuss he must not percuss we must not percuss you must not percuss they must not percuss	I must not be percussing you must not be percussing he must not be percussing we must not be percussing you must not be percussing they must not be percussing
Perfect	V-ing perfect
I must not have percussed you must not have percussed he must not have percussed we must not have percussed you must not have percussed they must not have percussed	I must not have been percussing you must not have been percussing he must not have been percussing we must not have been percussing you must not have been percussing they must not have been percussing

Interrogative form

Simple form	V-ing form
must I percuss? must you percuss? must he percuss? must we percuss? must you percuss? must they percuss?	must I be percussing? must you be percussing? must he be percussing? must we be percussing? must you be percussing? must they be percussing?
Perfect	V-ing perfect
must I have percussed? must you have percussed? must he have percussed? must we have percussed? must you have percussed? must they have percussed?	must I have been percussing? must you have been percussing? must he have been percussing? must we have been percussing? must you have been percussing? must they have been percussing?

Interro-negative form

Simple form	V-ing form
must I not percuss? must you not percuss? must he not percuss? must we not percuss? must you not percuss? must they not percuss?	must I not be percussing? must you not be percussing? must he not be percussing? must we not be percussing? must you not be percussing? must they not be percussing?
Perfect	V-ing perfect
must I not have percussed? must you not have percussed? must he not have percussed? must we not have percussed? must you not have percussed? must they not have percussed?	must I not have been percussing? must you not have been percussing? must he not have been percussing? must we not have been percussing? must you not have been percussing? must they not have been percussing?