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