I must prefer you must prefer he must prefer we must prefer you must prefer they must prefer
Forme en V-ing
I must be preferring you must be preferring he must be preferring we must be preferring you must be preferring they must be preferring
Perfect
I must have preferred you must have preferred he must have preferred we must have preferred you must have preferred they must have preferred
Perfect en V-ing
I must have been preferring you must have been preferring he must have been preferring we must have been preferring you must have been preferring they must have been preferring
Négation
Forme simple
I mustn't prefer you mustn't prefer he mustn't prefer we mustn't prefer you mustn't prefer they mustn't prefer
Forme en V-ing
I mustn't be preferring you mustn't be preferring he mustn't be preferring we mustn't be preferring you mustn't be preferring they mustn't be preferring
Perfect
I mustn't have preferred you mustn't have preferred he mustn't have preferred we mustn't have preferred you mustn't have preferred they mustn't have preferred
Perfect en V-ing
I mustn't have been preferring you mustn't have been preferring he mustn't have been preferring we mustn't have been preferring you mustn't have been preferring they mustn't have been preferring
Forme interrogative
Forme simple
must I prefer? must you prefer? must he prefer? must we prefer? must you prefer? must they prefer?
Forme en V-ing
must I be preferring? must you be preferring? must he be preferring? must we be preferring? must you be preferring? must they be preferring?
Perfect
must I have preferred? must you have preferred? must he have preferred? must we have preferred? must you have preferred? must they have preferred?
Perfect en V-ing
must I have been preferring? must you have been preferring? must he have been preferring? must we have been preferring? must you have been preferring? must they have been preferring?
Forme interro-négative
Forme simple
mustn't I prefer? mustn't you prefer? mustn't he prefer? mustn't we prefer? mustn't you prefer? mustn't they prefer?
Forme en V-ing
mustn't I be preferring? mustn't you be preferring? mustn't he be preferring? mustn't we be preferring? mustn't you be preferring? mustn't they be preferring?
Perfect
mustn't I have preferred? mustn't you have preferred? mustn't he have preferred? mustn't we have preferred? mustn't you have preferred? mustn't they have preferred?
Perfect en V-ing
mustn't I have been preferring? mustn't you have been preferring? mustn't he have been preferring? mustn't we have been preferring? mustn't you have been preferring? mustn't they have been preferring?