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