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