may prealter
Verbo regular: prealter - prealtered- prealtered

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I may prealter
you may prealter
he may prealter
we may prealter
you may prealter
they may prealter 	I may be prealtering
you may be prealtering
he may be prealtering
we may be prealtering
you may be prealtering
they may be prealtering	I may have prealtered
you may have prealtered
he may have prealtered
we may have prealtered
you may have prealtered
they may have prealtered	I may have been prealtering
you may have been prealtering
he may have been prealtering
we may have been prealtering
you may have been prealtering
they may have been prealtering	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mayn't prealter
you mayn't prealter
he mayn't prealter
we mayn't prealter
you mayn't prealter
they mayn't prealter 	I mayn't be prealtering
you mayn't be prealtering
he mayn't be prealtering
we mayn't be prealtering
you mayn't be prealtering
they mayn't be prealtering	I mayn't have prealtered
you mayn't have prealtered
he mayn't have prealtered
we mayn't have prealtered
you mayn't have prealtered
they mayn't have prealtered	I mayn't have been prealtering
you mayn't have been prealtering
he mayn't have been prealtering
we mayn't have been prealtering
you mayn't have been prealtering
they mayn't have been prealtering	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
may I prealter?
may you prealter?
may he prealter?
may we prealter?
may you prealter?
may they prealter? 	may I be prealtering?
may you be prealtering?
may he be prealtering?
may we be prealtering?
may you be prealtering?
may they be prealtering? 	may I have prealtered?
may you have prealtered?
may he have prealtered?
may we have prealtered?
may you have prealtered?
may they have prealtered? 	may I have been prealtering?
may you have been prealtering?
may he have been prealtering?
may we have been prealtering?
may you have been prealtering?
may they have been prealtering? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mayn't I prealter?
mayn't you prealter?
mayn't he prealter?
mayn't we prealter?
mayn't you prealter?
mayn't they prealter? 	mayn't I be prealtering?
mayn't you be prealtering?
mayn't he be prealtering?
mayn't we be prealtering?
mayn't you be prealtering?
mayn't they be prealtering? 	mayn't I have prealtered?
mayn't you have prealtered?
mayn't he have prealtered?
mayn't we have prealtered?
mayn't you have prealtered?
mayn't they have prealtered? 	mayn't I have been prealtering?
mayn't you have been prealtering?
mayn't he have been prealtering?
mayn't we have been prealtering?
mayn't you have been prealtering?
mayn't they have been prealtering?