I may preestablish you may preestablish he may preestablish we may preestablish you may preestablish they may preestablish
V-ing form
I may be preestablishing you may be preestablishing he may be preestablishing we may be preestablishing you may be preestablishing they may be preestablishing
Perfect
I may have preestablished you may have preestablished he may have preestablished we may have preestablished you may have preestablished they may have preestablished
V-ing perfect
I may have been preestablishing you may have been preestablishing he may have been preestablishing we may have been preestablishing you may have been preestablishing they may have been preestablishing
Negation
Simple form
I mayn't preestablish you mayn't preestablish he mayn't preestablish we mayn't preestablish you mayn't preestablish they mayn't preestablish
V-ing form
I mayn't be preestablishing you mayn't be preestablishing he mayn't be preestablishing we mayn't be preestablishing you mayn't be preestablishing they mayn't be preestablishing
Perfect
I mayn't have preestablished you mayn't have preestablished he mayn't have preestablished we mayn't have preestablished you mayn't have preestablished they mayn't have preestablished
V-ing perfect
I mayn't have been preestablishing you mayn't have been preestablishing he mayn't have been preestablishing we mayn't have been preestablishing you mayn't have been preestablishing they mayn't have been preestablishing
Interrogative form
Simple form
may I preestablish? may you preestablish? may he preestablish? may we preestablish? may you preestablish? may they preestablish?
V-ing form
may I be preestablishing? may you be preestablishing? may he be preestablishing? may we be preestablishing? may you be preestablishing? may they be preestablishing?
Perfect
may I have preestablished? may you have preestablished? may he have preestablished? may we have preestablished? may you have preestablished? may they have preestablished?
V-ing perfect
may I have been preestablishing? may you have been preestablishing? may he have been preestablishing? may we have been preestablishing? may you have been preestablishing? may they have been preestablishing?
Interro-negative form
Simple form
mayn't I preestablish? mayn't you preestablish? mayn't he preestablish? mayn't we preestablish? mayn't you preestablish? mayn't they preestablish?
V-ing form
mayn't I be preestablishing? mayn't you be preestablishing? mayn't he be preestablishing? mayn't we be preestablishing? mayn't you be preestablishing? mayn't they be preestablishing?
Perfect
mayn't I have preestablished? mayn't you have preestablished? mayn't he have preestablished? mayn't we have preestablished? mayn't you have preestablished? mayn't they have preestablished?
V-ing perfect
mayn't I have been preestablishing? mayn't you have been preestablishing? mayn't he have been preestablishing? mayn't we have been preestablishing? mayn't you have been preestablishing? mayn't they have been preestablishing?