I must grade you must grade she must grade we must grade you must grade they must grade
Forme en V-ing
I must be grading you must be grading she must be grading we must be grading you must be grading they must be grading
Perfect
I must have graded you must have graded she 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 she must have been grading we must have been grading you must have been grading they must have been grading
Négation
Forme simple
I must not grade you must not grade she must not grade we must not grade you must not grade they must not grade
Forme en V-ing
I must not be grading you must not be grading she must not be grading we must not be grading you must not be grading they must not be grading
Perfect
I must not have graded you must not have graded she must not have graded we must not have graded you must not have graded they must not have graded
Perfect en V-ing
I must not have been grading you must not have been grading she must not have been grading we must not have been grading you must not have been grading they must not have been grading
Forme interrogative
Forme simple
must I grade? must you grade? must she grade? must we grade? must you grade? must they grade?
Forme en V-ing
must I be grading? must you be grading? must she be grading? must we be grading? must you be grading? must they be grading?
Perfect
must I have graded? must you have graded? must she 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 she have been grading? must we have been grading? must you have been grading? must they have been grading?
Forme interro-négative
Forme simple
must I not grade? must you not grade? must she not grade? must we not grade? must you not grade? must they not grade?
Forme en V-ing
must I not be grading? must you not be grading? must she not be grading? must we not be grading? must you not be grading? must they not be grading?
Perfect
must I not have graded? must you not have graded? must she not have graded? must we not have graded? must you not have graded? must they not have graded?
Perfect en V-ing
must I not have been grading? must you not have been grading? must she not have been grading? must we not have been grading? must you not have been grading? must they not have been grading?