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