English verb conjugation
MUST AVOUCH

Regular verb: avouch - avouched - avouched

Affirmation

Simple form	V-ing form
I must avouch you must avouch she must avouch we must avouch you must avouch they must avouch	I must be avouching you must be avouching she 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 she 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 she 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 she 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 she 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 she 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 she 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 she avouch? must we avouch? must you avouch? must they avouch?	must I be avouching? must you be avouching? must she 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 she 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 she 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 she 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 she 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 she 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 she have been avouching? mustn't we have been avouching? mustn't you have been avouching? mustn't they have been avouching?