I must devitalize you must devitalize she must devitalize we must devitalize you must devitalize they must devitalize
Forme en V-ing
I must be devitalizing you must be devitalizing she must be devitalizing we must be devitalizing you must be devitalizing they must be devitalizing
Perfect
I must have devitalized you must have devitalized she must have devitalized we must have devitalized you must have devitalized they must have devitalized
Perfect en V-ing
I must have been devitalizing you must have been devitalizing she must have been devitalizing we must have been devitalizing you must have been devitalizing they must have been devitalizing
Négation
Forme simple
I mustn't devitalize you mustn't devitalize she mustn't devitalize we mustn't devitalize you mustn't devitalize they mustn't devitalize
Forme en V-ing
I mustn't be devitalizing you mustn't be devitalizing she mustn't be devitalizing we mustn't be devitalizing you mustn't be devitalizing they mustn't be devitalizing
Perfect
I mustn't have devitalized you mustn't have devitalized she mustn't have devitalized we mustn't have devitalized you mustn't have devitalized they mustn't have devitalized
Perfect en V-ing
I mustn't have been devitalizing you mustn't have been devitalizing she mustn't have been devitalizing we mustn't have been devitalizing you mustn't have been devitalizing they mustn't have been devitalizing
Forme interrogative
Forme simple
must I devitalize? must you devitalize? must she devitalize? must we devitalize? must you devitalize? must they devitalize?
Forme en V-ing
must I be devitalizing? must you be devitalizing? must she be devitalizing? must we be devitalizing? must you be devitalizing? must they be devitalizing?
Perfect
must I have devitalized? must you have devitalized? must she have devitalized? must we have devitalized? must you have devitalized? must they have devitalized?
Perfect en V-ing
must I have been devitalizing? must you have been devitalizing? must she have been devitalizing? must we have been devitalizing? must you have been devitalizing? must they have been devitalizing?
Forme interro-négative
Forme simple
mustn't I devitalize? mustn't you devitalize? mustn't she devitalize? mustn't we devitalize? mustn't you devitalize? mustn't they devitalize?
Forme en V-ing
mustn't I be devitalizing? mustn't you be devitalizing? mustn't she be devitalizing? mustn't we be devitalizing? mustn't you be devitalizing? mustn't they be devitalizing?
Perfect
mustn't I have devitalized? mustn't you have devitalized? mustn't she have devitalized? mustn't we have devitalized? mustn't you have devitalized? mustn't they have devitalized?
Perfect en V-ing
mustn't I have been devitalizing? mustn't you have been devitalizing? mustn't she have been devitalizing? mustn't we have been devitalizing? mustn't you have been devitalizing? mustn't they have been devitalizing?