I can avouch you can avouch she can avouch we can avouch you can avouch they can avouch
Forme en V-ing
I can be avouching you can be avouching she can be avouching we can be avouching you can be avouching they can be avouching
Perfect
I can have avouched you can have avouched she can have avouched we can have avouched you can have avouched they can have avouched
Perfect en V-ing
I can have been avouching you can have been avouching she can have been avouching we can have been avouching you can have been avouching they can have been avouching
Négation
Forme simple
I cannot avouch you cannot avouch she cannot avouch we cannot avouch you cannot avouch they cannot avouch
Forme en V-ing
I cannot be avouching you cannot be avouching she cannot be avouching we cannot be avouching you cannot be avouching they cannot be avouching
Perfect
I cannot have avouched you cannot have avouched she cannot have avouched we cannot have avouched you cannot have avouched they cannot have avouched
Perfect en V-ing
I cannot have been avouching you cannot have been avouching she cannot have been avouching we cannot have been avouching you cannot have been avouching they cannot have been avouching
Forme interrogative
Forme simple
can I avouch? can you avouch? can she avouch? can we avouch? can you avouch? can they avouch?
Forme en V-ing
can I be avouching? can you be avouching? can she be avouching? can we be avouching? can you be avouching? can they be avouching?
Perfect
can I have avouched? can you have avouched? can she have avouched? can we have avouched? can you have avouched? can they have avouched?
Perfect en V-ing
can I have been avouching? can you have been avouching? can she have been avouching? can we have been avouching? can you have been avouching? can they have been avouching?
Forme interro-négative
Forme simple
can I not avouch? can you not avouch? can she not avouch? can we not avouch? can you not avouch? can they not avouch?
Forme en V-ing
can I not be avouching? can you not be avouching? can she not be avouching? can we not be avouching? can you not be avouching? can they not be avouching?
Perfect
can I not have avouched? can you not have avouched? can she not have avouched? can we not have avouched? can you not have avouched? can they not have avouched?
Perfect en V-ing
can I not have been avouching? can you not have been avouching? can she not have been avouching? can we not have been avouching? can you not have been avouching? can they not have been avouching?