may alter
Verbo regular: alter - altered- altered

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I may alter
you may alter
she may alter
we may alter
you may alter
they may alter 	I may be altering
you may be altering
she may be altering
we may be altering
you may be altering
they may be altering	I may have altered
you may have altered
she may have altered
we may have altered
you may have altered
they may have altered	I may have been altering
you may have been altering
she may have been altering
we may have been altering
you may have been altering
they may have been altering	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mayn't alter
you mayn't alter
she mayn't alter
we mayn't alter
you mayn't alter
they mayn't alter 	I mayn't be altering
you mayn't be altering
she mayn't be altering
we mayn't be altering
you mayn't be altering
they mayn't be altering	I mayn't have altered
you mayn't have altered
she mayn't have altered
we mayn't have altered
you mayn't have altered
they mayn't have altered	I mayn't have been altering
you mayn't have been altering
she mayn't have been altering
we mayn't have been altering
you mayn't have been altering
they mayn't have been altering	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
may I alter?
may you alter?
may she alter?
may we alter?
may you alter?
may they alter? 	may I be altering?
may you be altering?
may she be altering?
may we be altering?
may you be altering?
may they be altering? 	may I have altered?
may you have altered?
may she have altered?
may we have altered?
may you have altered?
may they have altered? 	may I have been altering?
may you have been altering?
may she have been altering?
may we have been altering?
may you have been altering?
may they have been altering? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mayn't I alter?
mayn't you alter?
mayn't she alter?
mayn't we alter?
mayn't you alter?
mayn't they alter? 	mayn't I be altering?
mayn't you be altering?
mayn't she be altering?
mayn't we be altering?
mayn't you be altering?
mayn't they be altering? 	mayn't I have altered?
mayn't you have altered?
mayn't she have altered?
mayn't we have altered?
mayn't you have altered?
mayn't they have altered? 	mayn't I have been altering?
mayn't you have been altering?
mayn't she have been altering?
mayn't we have been altering?
mayn't you have been altering?
mayn't they have been altering?