English verb conjugation
MUST VOUCHSAFE

Regular verb: vouchsafe - vouchsafed - vouchsafed

Affirmation

Simple form	V-ing form
I must vouchsafe you must vouchsafe he must vouchsafe we must vouchsafe you must vouchsafe they must vouchsafe	I must be vouchsafing you must be vouchsafing he must be vouchsafing we must be vouchsafing you must be vouchsafing they must be vouchsafing
Perfect	V-ing perfect
I must have vouchsafed you must have vouchsafed he must have vouchsafed we must have vouchsafed you must have vouchsafed they must have vouchsafed	I must have been vouchsafing you must have been vouchsafing he must have been vouchsafing we must have been vouchsafing you must have been vouchsafing they must have been vouchsafing

Negation

Simple form	V-ing form
I must not vouchsafe you must not vouchsafe he must not vouchsafe we must not vouchsafe you must not vouchsafe they must not vouchsafe	I must not be vouchsafing you must not be vouchsafing he must not be vouchsafing we must not be vouchsafing you must not be vouchsafing they must not be vouchsafing
Perfect	V-ing perfect
I must not have vouchsafed you must not have vouchsafed he must not have vouchsafed we must not have vouchsafed you must not have vouchsafed they must not have vouchsafed	I must not have been vouchsafing you must not have been vouchsafing he must not have been vouchsafing we must not have been vouchsafing you must not have been vouchsafing they must not have been vouchsafing

Interrogative form

Simple form	V-ing form
must I vouchsafe? must you vouchsafe? must he vouchsafe? must we vouchsafe? must you vouchsafe? must they vouchsafe?	must I be vouchsafing? must you be vouchsafing? must he be vouchsafing? must we be vouchsafing? must you be vouchsafing? must they be vouchsafing?
Perfect	V-ing perfect
must I have vouchsafed? must you have vouchsafed? must he have vouchsafed? must we have vouchsafed? must you have vouchsafed? must they have vouchsafed?	must I have been vouchsafing? must you have been vouchsafing? must he have been vouchsafing? must we have been vouchsafing? must you have been vouchsafing? must they have been vouchsafing?

Interro-negative form

Simple form	V-ing form
must I not vouchsafe? must you not vouchsafe? must he not vouchsafe? must we not vouchsafe? must you not vouchsafe? must they not vouchsafe?	must I not be vouchsafing? must you not be vouchsafing? must he not be vouchsafing? must we not be vouchsafing? must you not be vouchsafing? must they not be vouchsafing?
Perfect	V-ing perfect
must I not have vouchsafed? must you not have vouchsafed? must he not have vouchsafed? must we not have vouchsafed? must you not have vouchsafed? must they not have vouchsafed?	must I not have been vouchsafing? must you not have been vouchsafing? must he not have been vouchsafing? must we not have been vouchsafing? must you not have been vouchsafing? must they not have been vouchsafing?