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