I must snake you must snake she must snake we must snake you must snake they must snake
Forme en V-ing
I must be snaking you must be snaking she must be snaking we must be snaking you must be snaking they must be snaking
Perfect
I must have snaked you must have snaked she must have snaked we must have snaked you must have snaked they must have snaked
Perfect en V-ing
I must have been snaking you must have been snaking she must have been snaking we must have been snaking you must have been snaking they must have been snaking
Négation
Forme simple
I mustn't snake you mustn't snake she mustn't snake we mustn't snake you mustn't snake they mustn't snake
Forme en V-ing
I mustn't be snaking you mustn't be snaking she mustn't be snaking we mustn't be snaking you mustn't be snaking they mustn't be snaking
Perfect
I mustn't have snaked you mustn't have snaked she mustn't have snaked we mustn't have snaked you mustn't have snaked they mustn't have snaked
Perfect en V-ing
I mustn't have been snaking you mustn't have been snaking she mustn't have been snaking we mustn't have been snaking you mustn't have been snaking they mustn't have been snaking
Forme interrogative
Forme simple
must I snake? must you snake? must she snake? must we snake? must you snake? must they snake?
Forme en V-ing
must I be snaking? must you be snaking? must she be snaking? must we be snaking? must you be snaking? must they be snaking?
Perfect
must I have snaked? must you have snaked? must she have snaked? must we have snaked? must you have snaked? must they have snaked?
Perfect en V-ing
must I have been snaking? must you have been snaking? must she have been snaking? must we have been snaking? must you have been snaking? must they have been snaking?
Forme interro-négative
Forme simple
mustn't I snake? mustn't you snake? mustn't she snake? mustn't we snake? mustn't you snake? mustn't they snake?
Forme en V-ing
mustn't I be snaking? mustn't you be snaking? mustn't she be snaking? mustn't we be snaking? mustn't you be snaking? mustn't they be snaking?
Perfect
mustn't I have snaked? mustn't you have snaked? mustn't she have snaked? mustn't we have snaked? mustn't you have snaked? mustn't they have snaked?
Perfect en V-ing
mustn't I have been snaking? mustn't you have been snaking? mustn't she have been snaking? mustn't we have been snaking? mustn't you have been snaking? mustn't they have been snaking?