may prealter
Regular verb: prealter - prealtered- prealtered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may not prealter
you may not prealter
he may not prealter
we may not prealter
you may not prealter
they may not prealter 	I may not be prealtering
you may not be prealtering
he may not be prealtering
we may not be prealtering
you may not be prealtering
they may not be prealtering	I may not have prealtered
you may not have prealtered
he may not have prealtered
we may not have prealtered
you may not have prealtered
they may not have prealtered	I may not have been prealtering
you may not have been prealtering
he may not have been prealtering
we may not have been prealtering
you may not have been prealtering
they may not have been prealtering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I not prealter?
may you not prealter?
may he not prealter?
may we not prealter?
may you not prealter?
may they not prealter? 	may I not be prealtering?
may you not be prealtering?
may he not be prealtering?
may we not be prealtering?
may you not be prealtering?
may they not be prealtering? 	may I not have prealtered?
may you not have prealtered?
may he not have prealtered?
may we not have prealtered?
may you not have prealtered?
may they not have prealtered? 	may I not have been prealtering?
may you not have been prealtering?
may he not have been prealtering?
may we not have been prealtering?
may you not have been prealtering?
may they not have been prealtering?