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