I can retard you can retard she can retard we can retard you can retard they can retard
Forme en V-ing
I can be retarding you can be retarding she can be retarding we can be retarding you can be retarding they can be retarding
Perfect
I can have retarded you can have retarded she can have retarded we can have retarded you can have retarded they can have retarded
Perfect en V-ing
I can have been retarding you can have been retarding she can have been retarding we can have been retarding you can have been retarding they can have been retarding
Négation
Forme simple
I can't retard you can't retard she can't retard we can't retard you can't retard they can't retard
Forme en V-ing
I can't be retarding you can't be retarding she can't be retarding we can't be retarding you can't be retarding they can't be retarding
Perfect
I can't have retarded you can't have retarded she can't have retarded we can't have retarded you can't have retarded they can't have retarded
Perfect en V-ing
I can't have been retarding you can't have been retarding she can't have been retarding we can't have been retarding you can't have been retarding they can't have been retarding
Forme interrogative
Forme simple
can I retard? can you retard? can she retard? can we retard? can you retard? can they retard?
Forme en V-ing
can I be retarding? can you be retarding? can she be retarding? can we be retarding? can you be retarding? can they be retarding?
Perfect
can I have retarded? can you have retarded? can she have retarded? can we have retarded? can you have retarded? can they have retarded?
Perfect en V-ing
can I have been retarding? can you have been retarding? can she have been retarding? can we have been retarding? can you have been retarding? can they have been retarding?
Forme interro-négative
Forme simple
can't I retard? can't you retard? can't she retard? can't we retard? can't you retard? can't they retard?
Forme en V-ing
can't I be retarding? can't you be retarding? can't she be retarding? can't we be retarding? can't you be retarding? can't they be retarding?
Perfect
can't I have retarded? can't you have retarded? can't she have retarded? can't we have retarded? can't you have retarded? can't they have retarded?
Perfect en V-ing
can't I have been retarding? can't you have been retarding? can't she have been retarding? can't we have been retarding? can't you have been retarding? can't they have been retarding?