can proof
Verbo regular: proof - proofed- proofed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can proof
you can proof
he can proof
we can proof
you can proof
they can proof 	I can be proofing
you can be proofing
he can be proofing
we can be proofing
you can be proofing
they can be proofing	I can have proofed
you can have proofed
he can have proofed
we can have proofed
you can have proofed
they can have proofed	I can have been proofing
you can have been proofing
he can have been proofing
we can have been proofing
you can have been proofing
they can have been proofing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I cannot proof
you cannot proof
he cannot proof
we cannot proof
you cannot proof
they cannot proof 	I cannot be proofing
you cannot be proofing
he cannot be proofing
we cannot be proofing
you cannot be proofing
they cannot be proofing	I cannot have proofed
you cannot have proofed
he cannot have proofed
we cannot have proofed
you cannot have proofed
they cannot have proofed	I cannot have been proofing
you cannot have been proofing
he cannot have been proofing
we cannot have been proofing
you cannot have been proofing
they cannot have been proofing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I proof?
can you proof?
can he proof?
can we proof?
can you proof?
can they proof? 	can I be proofing?
can you be proofing?
can he be proofing?
can we be proofing?
can you be proofing?
can they be proofing? 	can I have proofed?
can you have proofed?
can he have proofed?
can we have proofed?
can you have proofed?
can they have proofed? 	can I have been proofing?
can you have been proofing?
can he have been proofing?
can we have been proofing?
can you have been proofing?
can they have been proofing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I not proof?
can you not proof?
can he not proof?
can we not proof?
can you not proof?
can they not proof? 	can I not be proofing?
can you not be proofing?
can he not be proofing?
can we not be proofing?
can you not be proofing?
can they not be proofing? 	can I not have proofed?
can you not have proofed?
can he not have proofed?
can we not have proofed?
can you not have proofed?
can they not have proofed? 	can I not have been proofing?
can you not have been proofing?
can he not have been proofing?
can we not have been proofing?
can you not have been proofing?
can they not have been proofing?