I may concern you may concern she may concern we may concern you may concern they may concern
V-ing form
I may be concerning you may be concerning she may be concerning we may be concerning you may be concerning they may be concerning
Perfect
I may have concerned you may have concerned she may have concerned we may have concerned you may have concerned they may have concerned
V-ing perfect
I may have been concerning you may have been concerning she may have been concerning we may have been concerning you may have been concerning they may have been concerning
Negation
Simple form
I mayn't concern you mayn't concern she mayn't concern we mayn't concern you mayn't concern they mayn't concern
V-ing form
I mayn't be concerning you mayn't be concerning she mayn't be concerning we mayn't be concerning you mayn't be concerning they mayn't be concerning
Perfect
I mayn't have concerned you mayn't have concerned she mayn't have concerned we mayn't have concerned you mayn't have concerned they mayn't have concerned
V-ing perfect
I mayn't have been concerning you mayn't have been concerning she mayn't have been concerning we mayn't have been concerning you mayn't have been concerning they mayn't have been concerning
Interrogative form
Simple form
may I concern? may you concern? may she concern? may we concern? may you concern? may they concern?
V-ing form
may I be concerning? may you be concerning? may she be concerning? may we be concerning? may you be concerning? may they be concerning?
Perfect
may I have concerned? may you have concerned? may she have concerned? may we have concerned? may you have concerned? may they have concerned?
V-ing perfect
may I have been concerning? may you have been concerning? may she have been concerning? may we have been concerning? may you have been concerning? may they have been concerning?
Interro-negative form
Simple form
mayn't I concern? mayn't you concern? mayn't she concern? mayn't we concern? mayn't you concern? mayn't they concern?
V-ing form
mayn't I be concerning? mayn't you be concerning? mayn't she be concerning? mayn't we be concerning? mayn't you be concerning? mayn't they be concerning?
Perfect
mayn't I have concerned? mayn't you have concerned? mayn't she have concerned? mayn't we have concerned? mayn't you have concerned? mayn't they have concerned?
V-ing perfect
mayn't I have been concerning? mayn't you have been concerning? mayn't she have been concerning? mayn't we have been concerning? mayn't you have been concerning? mayn't they have been concerning?