Conjugaison du verbe anglais
CAN CERTIFY

Verbe régulier : certify - certified - certified
Traduction française : certifier - attester

Affirmation

Forme simple	Forme en 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
Perfect	Perfect en 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

Négation

Forme simple	Forme en V-ing
I can't certify you can't certify he can't certify we can't certify you can't certify they can't certify	I can't be certifying you can't be certifying he can't be certifying we can't be certifying you can't be certifying they can't be certifying
Perfect	Perfect en V-ing
I can't have certified you can't have certified he can't have certified we can't have certified you can't have certified they can't have certified	I can't have been certifying you can't have been certifying he can't have been certifying we can't have been certifying you can't have been certifying they can't have been certifying

Forme interrogative

Forme simple	Forme en 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?
Perfect	Perfect en 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?

Forme interro-négative

Forme simple	Forme en V-ing
can't I certify? can't you certify? can't he certify? can't we certify? can't you certify? can't they certify?	can't I be certifying? can't you be certifying? can't he be certifying? can't we be certifying? can't you be certifying? can't they be certifying?
Perfect	Perfect en V-ing
can't I have certified? can't you have certified? can't he have certified? can't we have certified? can't you have certified? can't they have certified?	can't I have been certifying? can't you have been certifying? can't he have been certifying? can't we have been certifying? can't you have been certifying? can't they have been certifying?