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 may not center you may not center she may not center we may not center you may not center they may not center
V-ing form
I may not be centering you may not be centering she may not be centering we may not be centering you may not be centering they may not be centering
Perfect
I may not have centered you may not have centered she may not have centered we may not have centered you may not have centered they may not have centered
V-ing perfect
I may not have been centering you may not have been centering she may not have been centering we may not have been centering you may not have been centering they may not 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
may I not center? may you not center? may she not center? may we not center? may you not center? may they not center?
V-ing form
may I not be centering? may you not be centering? may she not be centering? may we not be centering? may you not be centering? may they not be centering?
Perfect
may I not have centered? may you not have centered? may she not have centered? may we not have centered? may you not have centered? may they not have centered?
V-ing perfect
may I not have been centering? may you not have been centering? may she not have been centering? may we not have been centering? may you not have been centering? may they not have been centering?