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