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