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