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 must not avouch you must not avouch he must not avouch we must not avouch you must not avouch they must not avouch	I must not be avouching you must not be avouching he must not be avouching we must not be avouching you must not be avouching they must not be avouching
Perfect	V-ing perfect
I must not have avouched you must not have avouched he must not have avouched we must not have avouched you must not have avouched they must not have avouched	I must not have been avouching you must not have been avouching he must not have been avouching we must not have been avouching you must not have been avouching they must not 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
must I not avouch? must you not avouch? must he not avouch? must we not avouch? must you not avouch? must they not avouch?	must I not be avouching? must you not be avouching? must he not be avouching? must we not be avouching? must you not be avouching? must they not be avouching?
Perfect	V-ing perfect
must I not have avouched? must you not have avouched? must he not have avouched? must we not have avouched? must you not have avouched? must they not have avouched?	must I not have been avouching? must you not have been avouching? must he not have been avouching? must we not have been avouching? must you not have been avouching? must they not have been avouching?