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