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