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