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