may master
Verbo regular: master - mastered- mastered

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I may master
you may master
she may master
we may master
you may master
they may master 	I may be mastering
you may be mastering
she may be mastering
we may be mastering
you may be mastering
they may be mastering	I may have mastered
you may have mastered
she may have mastered
we may have mastered
you may have mastered
they may have mastered	I may have been mastering
you may have been mastering
she may have been mastering
we may have been mastering
you may have been mastering
they may have been mastering	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mayn't master
you mayn't master
she mayn't master
we mayn't master
you mayn't master
they mayn't master 	I mayn't be mastering
you mayn't be mastering
she mayn't be mastering
we mayn't be mastering
you mayn't be mastering
they mayn't be mastering	I mayn't have mastered
you mayn't have mastered
she mayn't have mastered
we mayn't have mastered
you mayn't have mastered
they mayn't have mastered	I mayn't have been mastering
you mayn't have been mastering
she mayn't have been mastering
we mayn't have been mastering
you mayn't have been mastering
they mayn't have been mastering	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
may I master?
may you master?
may she master?
may we master?
may you master?
may they master? 	may I be mastering?
may you be mastering?
may she be mastering?
may we be mastering?
may you be mastering?
may they be mastering? 	may I have mastered?
may you have mastered?
may she have mastered?
may we have mastered?
may you have mastered?
may they have mastered? 	may I have been mastering?
may you have been mastering?
may she have been mastering?
may we have been mastering?
may you have been mastering?
may they have been mastering? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mayn't I master?
mayn't you master?
mayn't she master?
mayn't we master?
mayn't you master?
mayn't they master? 	mayn't I be mastering?
mayn't you be mastering?
mayn't she be mastering?
mayn't we be mastering?
mayn't you be mastering?
mayn't they be mastering? 	mayn't I have mastered?
mayn't you have mastered?
mayn't she have mastered?
mayn't we have mastered?
mayn't you have mastered?
mayn't they have mastered? 	mayn't I have been mastering?
mayn't you have been mastering?
mayn't she have been mastering?
mayn't we have been mastering?
mayn't you have been mastering?
mayn't they have been mastering?