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