I can retard you can retard he can retard we can retard you can retard they can retard
Forma com V-ing
I can be retarding you can be retarding he can be retarding we can be retarding you can be retarding they can be retarding
Perfeito
I can have retarded you can have retarded he can have retarded we can have retarded you can have retarded they can have retarded
Perfeito com V-ing
I can have been retarding you can have been retarding he can have been retarding we can have been retarding you can have been retarding they can have been retarding
Negação
Forma simple
I can't retard you can't retard he can't retard we can't retard you can't retard they can't retard
Forma com V-ing
I can't be retarding you can't be retarding he can't be retarding we can't be retarding you can't be retarding they can't be retarding
Perfeito
I can't have retarded you can't have retarded he can't have retarded we can't have retarded you can't have retarded they can't have retarded
Perfeito com V-ing
I can't have been retarding you can't have been retarding he can't have been retarding we can't have been retarding you can't have been retarding they can't have been retarding
Forma interrogativa
Forma simple
can I retard? can you retard? can he retard? can we retard? can you retard? can they retard?
Forma com V-ing
can I be retarding? can you be retarding? can he be retarding? can we be retarding? can you be retarding? can they be retarding?
Perfeito
can I have retarded? can you have retarded? can he have retarded? can we have retarded? can you have retarded? can they have retarded?
Perfeito com V-ing
can I have been retarding? can you have been retarding? can he have been retarding? can we have been retarding? can you have been retarding? can they have been retarding?
Forma interro-Negação
Forma simple
can't I retard? can't you retard? can't he retard? can't we retard? can't you retard? can't they retard?
Forma com V-ing
can't I be retarding? can't you be retarding? can't he be retarding? can't we be retarding? can't you be retarding? can't they be retarding?
Perfeito
can't I have retarded? can't you have retarded? can't he have retarded? can't we have retarded? can't you have retarded? can't they have retarded?
Perfeito com V-ing
can't I have been retarding? can't you have been retarding? can't he have been retarding? can't we have been retarding? can't you have been retarding? can't they have been retarding?