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