may preface
Regular verb: preface - prefaced- prefaced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may preface
you may preface
she may preface
we may preface
you may preface
they may preface 	I may be prefacing
you may be prefacing
she may be prefacing
we may be prefacing
you may be prefacing
they may be prefacing	I may have prefaced
you may have prefaced
she may have prefaced
we may have prefaced
you may have prefaced
they may have prefaced	I may have been prefacing
you may have been prefacing
she may have been prefacing
we may have been prefacing
you may have been prefacing
they may have been prefacing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may not preface
you may not preface
she may not preface
we may not preface
you may not preface
they may not preface 	I may not be prefacing
you may not be prefacing
she may not be prefacing
we may not be prefacing
you may not be prefacing
they may not be prefacing	I may not have prefaced
you may not have prefaced
she may not have prefaced
we may not have prefaced
you may not have prefaced
they may not have prefaced	I may not have been prefacing
you may not have been prefacing
she may not have been prefacing
we may not have been prefacing
you may not have been prefacing
they may not have been prefacing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I preface?
may you preface?
may she preface?
may we preface?
may you preface?
may they preface? 	may I be prefacing?
may you be prefacing?
may she be prefacing?
may we be prefacing?
may you be prefacing?
may they be prefacing? 	may I have prefaced?
may you have prefaced?
may she have prefaced?
may we have prefaced?
may you have prefaced?
may they have prefaced? 	may I have been prefacing?
may you have been prefacing?
may she have been prefacing?
may we have been prefacing?
may you have been prefacing?
may they have been prefacing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I not preface?
may you not preface?
may she not preface?
may we not preface?
may you not preface?
may they not preface? 	may I not be prefacing?
may you not be prefacing?
may she not be prefacing?
may we not be prefacing?
may you not be prefacing?
may they not be prefacing? 	may I not have prefaced?
may you not have prefaced?
may she not have prefaced?
may we not have prefaced?
may you not have prefaced?
may they not have prefaced? 	may I not have been prefacing?
may you not have been prefacing?
may she not have been prefacing?
may we not have been prefacing?
may you not have been prefacing?
may they not have been prefacing?