Conjugação do verbo inglês
CAN CERTIFY

Verbo regular: certify - certified - certified

Afirmação

Forma simple	Forma com V-ing
I can certify you can certify he can certify we can certify you can certify they can certify	I can be certifying you can be certifying he can be certifying we can be certifying you can be certifying they can be certifying
Perfeito	Perfeito com V-ing
I can have certified you can have certified he can have certified we can have certified you can have certified they can have certified	I can have been certifying you can have been certifying he can have been certifying we can have been certifying you can have been certifying they can have been certifying

Negação

Forma simple	Forma com V-ing
I cannot certify you cannot certify he cannot certify we cannot certify you cannot certify they cannot certify	I cannot be certifying you cannot be certifying he cannot be certifying we cannot be certifying you cannot be certifying they cannot be certifying
Perfeito	Perfeito com V-ing
I cannot have certified you cannot have certified he cannot have certified we cannot have certified you cannot have certified they cannot have certified	I cannot have been certifying you cannot have been certifying he cannot have been certifying we cannot have been certifying you cannot have been certifying they cannot have been certifying

Forma interrogativa

Forma simple	Forma com V-ing
can I certify? can you certify? can he certify? can we certify? can you certify? can they certify?	can I be certifying? can you be certifying? can he be certifying? can we be certifying? can you be certifying? can they be certifying?
Perfeito	Perfeito com V-ing
can I have certified? can you have certified? can he have certified? can we have certified? can you have certified? can they have certified?	can I have been certifying? can you have been certifying? can he have been certifying? can we have been certifying? can you have been certifying? can they have been certifying?

Forma interro-Negação

Forma simple	Forma com V-ing
can I not certify? can you not certify? can he not certify? can we not certify? can you not certify? can they not certify?	can I not be certifying? can you not be certifying? can he not be certifying? can we not be certifying? can you not be certifying? can they not be certifying?
Perfeito	Perfeito com V-ing
can I not have certified? can you not have certified? can he not have certified? can we not have certified? can you not have certified? can they not have certified?	can I not have been certifying? can you not have been certifying? can he not have been certifying? can we not have been certifying? can you not have been certifying? can they not have been certifying?