English verb conjugation
CAN AVOUCH

Regular verb: avouch - avouched - avouched

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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