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