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