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