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