I can avouch you can avouch she can avouch we can avouch you can avouch they can avouch
Forma com 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
Perfeito
I can have avouched you can have avouched she can have avouched we can have avouched you can have avouched they can have avouched
Perfeito com 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
Negação
Forma simple
I cannot avouch you cannot avouch she cannot avouch we cannot avouch you cannot avouch they cannot avouch
Forma com 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
Perfeito
I cannot have avouched you cannot have avouched she cannot have avouched we cannot have avouched you cannot have avouched they cannot have avouched
Perfeito com 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
Forma interrogativa
Forma simple
can I avouch? can you avouch? can she avouch? can we avouch? can you avouch? can they avouch?
Forma com 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?
Perfeito
can I have avouched? can you have avouched? can she have avouched? can we have avouched? can you have avouched? can they have avouched?
Perfeito com 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?
Forma interro-Negação
Forma 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?
Forma com 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?
Perfeito
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?
Perfeito com 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?