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
he may alter
we may alter
you may alter
they may alter 	I may be altering
you may be altering
he may be altering
we may be altering
you may be altering
they may be altering	I may have altered
you may have altered
he 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
he 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 may not alter
you may not alter
he may not alter
we may not alter
you may not alter
they may not alter 	I may not be altering
you may not be altering
he may not be altering
we may not be altering
you may not be altering
they may not be altering	I may not have altered
you may not have altered
he may not have altered
we may not have altered
you may not have altered
they may not have altered	I may not have been altering
you may not have been altering
he may not have been altering
we may not have been altering
you may not have been altering
they may not have been altering	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
may I alter?
may you alter?
may he alter?
may we alter?
may you alter?
may they alter? 	may I be altering?
may you be altering?
may he be altering?
may we be altering?
may you be altering?
may they be altering? 	may I have altered?
may you have altered?
may he 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 he 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 	
may I not alter?
may you not alter?
may he not alter?
may we not alter?
may you not alter?
may they not alter? 	may I not be altering?
may you not be altering?
may he not be altering?
may we not be altering?
may you not be altering?
may they not be altering? 	may I not have altered?
may you not have altered?
may he not have altered?
may we not have altered?
may you not have altered?
may they not have altered? 	may I not have been altering?
may you not have been altering?
may he not have been altering?
may we not have been altering?
may you not have been altering?
may they not have been altering?