I can proof you can proof he can proof we can proof you can proof they can proof
Forma com V-ing
I can be proofing you can be proofing he can be proofing we can be proofing you can be proofing they can be proofing
Perfeito
I can have proofed you can have proofed he can have proofed we can have proofed you can have proofed they can have proofed
Perfeito com V-ing
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
I can't proof you can't proof he can't proof we can't proof you can't proof they can't proof
Forma com V-ing
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
Perfeito
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
Perfeito com V-ing
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
can I proof? can you proof? can he proof? can we proof? can you proof? can they proof?
Forma com V-ing
can I be proofing? can you be proofing? can he be proofing? can we be proofing? can you be proofing? can they be proofing?
Perfeito
can I have proofed? can you have proofed? can he have proofed? can we have proofed? can you have proofed? can they have proofed?
Perfeito com V-ing
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
can't I proof? can't you proof? can't he proof? can't we proof? can't you proof? can't they proof?
Forma com V-ing
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?
Perfeito
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?
Perfeito com V-ing
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?