I may preexist you may preexist he may preexist we may preexist you may preexist they may preexist
V-ing form
I may be preexisting you may be preexisting he may be preexisting we may be preexisting you may be preexisting they may be preexisting
Perfect
I may have preexisted you may have preexisted he may have preexisted we may have preexisted you may have preexisted they may have preexisted
V-ing perfect
I may have been preexisting you may have been preexisting he may have been preexisting we may have been preexisting you may have been preexisting they may have been preexisting
Negation
Simple form
I may not preexist you may not preexist he may not preexist we may not preexist you may not preexist they may not preexist
V-ing form
I may not be preexisting you may not be preexisting he may not be preexisting we may not be preexisting you may not be preexisting they may not be preexisting
Perfect
I may not have preexisted you may not have preexisted he may not have preexisted we may not have preexisted you may not have preexisted they may not have preexisted
V-ing perfect
I may not have been preexisting you may not have been preexisting he may not have been preexisting we may not have been preexisting you may not have been preexisting they may not have been preexisting
Interrogative form
Simple form
may I preexist? may you preexist? may he preexist? may we preexist? may you preexist? may they preexist?
V-ing form
may I be preexisting? may you be preexisting? may he be preexisting? may we be preexisting? may you be preexisting? may they be preexisting?
Perfect
may I have preexisted? may you have preexisted? may he have preexisted? may we have preexisted? may you have preexisted? may they have preexisted?
V-ing perfect
may I have been preexisting? may you have been preexisting? may he have been preexisting? may we have been preexisting? may you have been preexisting? may they have been preexisting?
Interro-negative form
Simple form
may I not preexist? may you not preexist? may he not preexist? may we not preexist? may you not preexist? may they not preexist?
V-ing form
may I not be preexisting? may you not be preexisting? may he not be preexisting? may we not be preexisting? may you not be preexisting? may they not be preexisting?
Perfect
may I not have preexisted? may you not have preexisted? may he not have preexisted? may we not have preexisted? may you not have preexisted? may they not have preexisted?
V-ing perfect
may I not have been preexisting? may you not have been preexisting? may he not have been preexisting? may we not have been preexisting? may you not have been preexisting? may they not have been preexisting?