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