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