may grade
Verbo regular: grade - graded- graded

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I may grade
you may grade
he may grade
we may grade
you may grade
they may grade 	I may be grading
you may be grading
he may be grading
we may be grading
you may be grading
they may be grading	I may have graded
you may have graded
he may have graded
we may have graded
you may have graded
they may have graded	I may have been grading
you may have been grading
he may have been grading
we may have been grading
you may have been grading
they may have been grading	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I may not grade
you may not grade
he may not grade
we may not grade
you may not grade
they may not grade 	I may not be grading
you may not be grading
he may not be grading
we may not be grading
you may not be grading
they may not be grading	I may not have graded
you may not have graded
he may not have graded
we may not have graded
you may not have graded
they may not have graded	I may not have been grading
you may not have been grading
he 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 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
may I grade?
may you grade?
may he grade?
may we grade?
may you grade?
may they grade? 	may I be grading?
may you be grading?
may he be grading?
may we be grading?
may you be grading?
may they be grading? 	may I have graded?
may you have graded?
may he have graded?
may we have graded?
may you have graded?
may they have graded? 	may I have been grading?
may you have been grading?
may he have been grading?
may we have been grading?
may you have been grading?
may they have been grading? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
may I not grade?
may you not grade?
may he not grade?
may we not grade?
may you not grade?
may they not grade? 	may I not be grading?
may you not be grading?
may he not be grading?
may we not be grading?
may you not be grading?
may they not be grading? 	may I not have graded?
may you not have graded?
may he not have graded?
may we not have graded?
may you not have graded?
may they not have graded? 	may I not have been grading?
may you not have been grading?
may he not have been grading?
may we not have been grading?
may you not have been grading?
may they not have been grading?