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 can't proof
you can't proof
he can't proof
we can't proof
you can't proof
they can't proof 	I can't be proofing
you can't be proofing
he can't be proofing
we can't be proofing
you can't be proofing
they can't be proofing	I can't have proofed
you can't have proofed
he can't have proofed
we can't have proofed
you can't have proofed
they can't have proofed	I can't have been proofing
you can't have been proofing
he can't have been proofing
we can't have been proofing
you can't have been proofing
they can't 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't I proof?
can't you proof?
can't he proof?
can't we proof?
can't you proof?
can't they proof? 	can't I be proofing?
can't you be proofing?
can't he be proofing?
can't we be proofing?
can't you be proofing?
can't they be proofing? 	can't I have proofed?
can't you have proofed?
can't he have proofed?
can't we have proofed?
can't you have proofed?
can't they have proofed? 	can't I have been proofing?
can't you have been proofing?
can't he have been proofing?
can't we have been proofing?
can't you have been proofing?
can't they have been proofing?