can attest
Verbo regular: attest - attested- attested

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can attest
you can attest
he can attest
we can attest
you can attest
they can attest 	I can be attesting
you can be attesting
he can be attesting
we can be attesting
you can be attesting
they can be attesting	I can have attested
you can have attested
he can have attested
we can have attested
you can have attested
they can have attested	I can have been attesting
you can have been attesting
he can have been attesting
we can have been attesting
you can have been attesting
they can have been attesting	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can't attest
you can't attest
he can't attest
we can't attest
you can't attest
they can't attest 	I can't be attesting
you can't be attesting
he can't be attesting
we can't be attesting
you can't be attesting
they can't be attesting	I can't have attested
you can't have attested
he can't have attested
we can't have attested
you can't have attested
they can't have attested	I can't have been attesting
you can't have been attesting
he can't have been attesting
we can't have been attesting
you can't have been attesting
they can't have been attesting	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I attest?
can you attest?
can he attest?
can we attest?
can you attest?
can they attest? 	can I be attesting?
can you be attesting?
can he be attesting?
can we be attesting?
can you be attesting?
can they be attesting? 	can I have attested?
can you have attested?
can he have attested?
can we have attested?
can you have attested?
can they have attested? 	can I have been attesting?
can you have been attesting?
can he have been attesting?
can we have been attesting?
can you have been attesting?
can they have been attesting? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can't I attest?
can't you attest?
can't he attest?
can't we attest?
can't you attest?
can't they attest? 	can't I be attesting?
can't you be attesting?
can't he be attesting?
can't we be attesting?
can't you be attesting?
can't they be attesting? 	can't I have attested?
can't you have attested?
can't he have attested?
can't we have attested?
can't you have attested?
can't they have attested? 	can't I have been attesting?
can't you have been attesting?
can't he have been attesting?
can't we have been attesting?
can't you have been attesting?
can't they have been attesting?