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