English verb conjugation
MUST AVOUCH

Regular verb: avouch - avouched - avouched

Affirmation

Simple form	V-ing form
I must avouch you must avouch he must avouch we must avouch you must avouch they must avouch	I must be avouching you must be avouching he must be avouching we must be avouching you must be avouching they must be avouching
Perfect	V-ing perfect
I must have avouched you must have avouched he must have avouched we must have avouched you must have avouched they must have avouched	I must have been avouching you must have been avouching he must have been avouching we must have been avouching you must have been avouching they must have been avouching

Negation

Simple form	V-ing form
I mustn't avouch you mustn't avouch he mustn't avouch we mustn't avouch you mustn't avouch they mustn't avouch	I mustn't be avouching you mustn't be avouching he mustn't be avouching we mustn't be avouching you mustn't be avouching they mustn't be avouching
Perfect	V-ing perfect
I mustn't have avouched you mustn't have avouched he mustn't have avouched we mustn't have avouched you mustn't have avouched they mustn't have avouched	I mustn't have been avouching you mustn't have been avouching he mustn't have been avouching we mustn't have been avouching you mustn't have been avouching they mustn't have been avouching

Interrogative form

Simple form	V-ing form
must I avouch? must you avouch? must he avouch? must we avouch? must you avouch? must they avouch?	must I be avouching? must you be avouching? must he be avouching? must we be avouching? must you be avouching? must they be avouching?
Perfect	V-ing perfect
must I have avouched? must you have avouched? must he have avouched? must we have avouched? must you have avouched? must they have avouched?	must I have been avouching? must you have been avouching? must he have been avouching? must we have been avouching? must you have been avouching? must they have been avouching?

Interro-negative form

Simple form	V-ing form
mustn't I avouch? mustn't you avouch? mustn't he avouch? mustn't we avouch? mustn't you avouch? mustn't they avouch?	mustn't I be avouching? mustn't you be avouching? mustn't he be avouching? mustn't we be avouching? mustn't you be avouching? mustn't they be avouching?
Perfect	V-ing perfect
mustn't I have avouched? mustn't you have avouched? mustn't he have avouched? mustn't we have avouched? mustn't you have avouched? mustn't they have avouched?	mustn't I have been avouching? mustn't you have been avouching? mustn't he have been avouching? mustn't we have been avouching? mustn't you have been avouching? mustn't they have been avouching?