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