I may grade you may grade she may grade we may grade you may grade they may grade
Forma con V-ing
I may be grading you may be grading she may be grading we may be grading you may be grading they may be grading
Perfecto
I may have graded you may have graded she may have graded we may have graded you may have graded they may have graded
Perfecto con V-ing
I may have been grading you may have been grading she may have been grading we may have been grading you may have been grading they may have been grading
Negación
Forma simple
I may not grade you may not grade she may not grade we may not grade you may not grade they may not grade
Forma con V-ing
I may not be grading you may not be grading she may not be grading we may not be grading you may not be grading they may not be grading
Perfecto
I may not have graded you may not have graded she may not have graded we may not have graded you may not have graded they may not have graded
Perfecto con V-ing
I may not have been grading you may not have been grading she may not have been grading we may not have been grading you may not have been grading they may not have been grading
Forma interrogativa
Forma simple
may I grade? may you grade? may she grade? may we grade? may you grade? may they grade?
Forma con V-ing
may I be grading? may you be grading? may she be grading? may we be grading? may you be grading? may they be grading?
Perfecto
may I have graded? may you have graded? may she have graded? may we have graded? may you have graded? may they have graded?
Perfecto con V-ing
may I have been grading? may you have been grading? may she have been grading? may we have been grading? may you have been grading? may they have been grading?
Forma interro-negativa
Forma simple
may I not grade? may you not grade? may she not grade? may we not grade? may you not grade? may they not grade?
Forma con V-ing
may I not be grading? may you not be grading? may she not be grading? may we not be grading? may you not be grading? may they not be grading?
Perfecto
may I not have graded? may you not have graded? may she not have graded? may we not have graded? may you not have graded? may they not have graded?
Perfecto con V-ing
may I not have been grading? may you not have been grading? may she not have been grading? may we not have been grading? may you not have been grading? may they not have been grading?