can vouch
Verbo regular: vouch - vouched- vouched

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can vouch
you can vouch
he can vouch
we can vouch
you can vouch
they can vouch 	I can be vouching
you can be vouching
he can be vouching
we can be vouching
you can be vouching
they can be vouching	I can have vouched
you can have vouched
he can have vouched
we can have vouched
you can have vouched
they can have vouched	I can have been vouching
you can have been vouching
he can have been vouching
we can have been vouching
you can have been vouching
they can have been vouching	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I cannot vouch
you cannot vouch
he cannot vouch
we cannot vouch
you cannot vouch
they cannot vouch 	I cannot be vouching
you cannot be vouching
he cannot be vouching
we cannot be vouching
you cannot be vouching
they cannot be vouching	I cannot have vouched
you cannot have vouched
he cannot have vouched
we cannot have vouched
you cannot have vouched
they cannot have vouched	I cannot have been vouching
you cannot have been vouching
he cannot have been vouching
we cannot have been vouching
you cannot have been vouching
they cannot have been vouching	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I vouch?
can you vouch?
can he vouch?
can we vouch?
can you vouch?
can they vouch? 	can I be vouching?
can you be vouching?
can he be vouching?
can we be vouching?
can you be vouching?
can they be vouching? 	can I have vouched?
can you have vouched?
can he have vouched?
can we have vouched?
can you have vouched?
can they have vouched? 	can I have been vouching?
can you have been vouching?
can he have been vouching?
can we have been vouching?
can you have been vouching?
can they have been vouching? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I not vouch?
can you not vouch?
can he not vouch?
can we not vouch?
can you not vouch?
can they not vouch? 	can I not be vouching?
can you not be vouching?
can he not be vouching?
can we not be vouching?
can you not be vouching?
can they not be vouching? 	can I not have vouched?
can you not have vouched?
can he not have vouched?
can we not have vouched?
can you not have vouched?
can they not have vouched? 	can I not have been vouching?
can you not have been vouching?
can he not have been vouching?
can we not have been vouching?
can you not have been vouching?
can they not have been vouching?