I may avouch you may avouch he may avouch we may avouch you may avouch they may avouch
V-ing form
I may be avouching you may be avouching he may be avouching we may be avouching you may be avouching they may be avouching
Perfect
I may have avouched you may have avouched he may have avouched we may have avouched you may have avouched they may have avouched
V-ing perfect
I may have been avouching you may have been avouching he may have been avouching we may have been avouching you may have been avouching they may have been avouching
Negation
Simple form
I may not avouch you may not avouch he may not avouch we may not avouch you may not avouch they may not avouch
V-ing form
I may not be avouching you may not be avouching he may not be avouching we may not be avouching you may not be avouching they may not be avouching
Perfect
I may not have avouched you may not have avouched he may not have avouched we may not have avouched you may not have avouched they may not have avouched
V-ing perfect
I may not have been avouching you may not have been avouching he may not have been avouching we may not have been avouching you may not have been avouching they may not have been avouching
Interrogative form
Simple form
may I avouch? may you avouch? may he avouch? may we avouch? may you avouch? may they avouch?
V-ing form
may I be avouching? may you be avouching? may he be avouching? may we be avouching? may you be avouching? may they be avouching?
Perfect
may I have avouched? may you have avouched? may he have avouched? may we have avouched? may you have avouched? may they have avouched?
V-ing perfect
may I have been avouching? may you have been avouching? may he have been avouching? may we have been avouching? may you have been avouching? may they have been avouching?
Interro-negative form
Simple form
may I not avouch? may you not avouch? may he not avouch? may we not avouch? may you not avouch? may they not avouch?
V-ing form
may I not be avouching? may you not be avouching? may he not be avouching? may we not be avouching? may you not be avouching? may they not be avouching?
Perfect
may I not have avouched? may you not have avouched? may he not have avouched? may we not have avouched? may you not have avouched? may they not have avouched?
V-ing perfect
may I not have been avouching? may you not have been avouching? may he not have been avouching? may we not have been avouching? may you not have been avouching? may they not have been avouching?