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