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