English verb conjugation
MUST VOUCHSAFE

Regular verb: vouchsafe - vouchsafed - vouchsafed

Affirmation

Simple form	V-ing form
I must vouchsafe you must vouchsafe she must vouchsafe we must vouchsafe you must vouchsafe they must vouchsafe	I must be vouchsafing you must be vouchsafing she 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 she 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 she 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 mustn't vouchsafe you mustn't vouchsafe she mustn't vouchsafe we mustn't vouchsafe you mustn't vouchsafe they mustn't vouchsafe	I mustn't be vouchsafing you mustn't be vouchsafing she mustn't be vouchsafing we mustn't be vouchsafing you mustn't be vouchsafing they mustn't be vouchsafing
Perfect	V-ing perfect
I mustn't have vouchsafed you mustn't have vouchsafed she mustn't have vouchsafed we mustn't have vouchsafed you mustn't have vouchsafed they mustn't have vouchsafed	I mustn't have been vouchsafing you mustn't have been vouchsafing she mustn't have been vouchsafing we mustn't have been vouchsafing you mustn't have been vouchsafing they mustn't have been vouchsafing

Interrogative form

Simple form	V-ing form
must I vouchsafe? must you vouchsafe? must she vouchsafe? must we vouchsafe? must you vouchsafe? must they vouchsafe?	must I be vouchsafing? must you be vouchsafing? must she 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 she 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 she 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
mustn't I vouchsafe? mustn't you vouchsafe? mustn't she vouchsafe? mustn't we vouchsafe? mustn't you vouchsafe? mustn't they vouchsafe?	mustn't I be vouchsafing? mustn't you be vouchsafing? mustn't she be vouchsafing? mustn't we be vouchsafing? mustn't you be vouchsafing? mustn't they be vouchsafing?
Perfect	V-ing perfect
mustn't I have vouchsafed? mustn't you have vouchsafed? mustn't she have vouchsafed? mustn't we have vouchsafed? mustn't you have vouchsafed? mustn't they have vouchsafed?	mustn't I have been vouchsafing? mustn't you have been vouchsafing? mustn't she have been vouchsafing? mustn't we have been vouchsafing? mustn't you have been vouchsafing? mustn't they have been vouchsafing?