I may dam you may dam she may dam we may dam you may dam they may dam
V-ing form
I may be damming you may be damming she may be damming we may be damming you may be damming they may be damming
Perfect
I may have dammed you may have dammed she may have dammed we may have dammed you may have dammed they may have dammed
V-ing perfect
I may have been damming you may have been damming she may have been damming we may have been damming you may have been damming they may have been damming
Negation
Simple form
I may not dam you may not dam she may not dam we may not dam you may not dam they may not dam
V-ing form
I may not be damming you may not be damming she may not be damming we may not be damming you may not be damming they may not be damming
Perfect
I may not have dammed you may not have dammed she may not have dammed we may not have dammed you may not have dammed they may not have dammed
V-ing perfect
I may not have been damming you may not have been damming she may not have been damming we may not have been damming you may not have been damming they may not have been damming
Interrogative form
Simple form
may I dam? may you dam? may she dam? may we dam? may you dam? may they dam?
V-ing form
may I be damming? may you be damming? may she be damming? may we be damming? may you be damming? may they be damming?
Perfect
may I have dammed? may you have dammed? may she have dammed? may we have dammed? may you have dammed? may they have dammed?
V-ing perfect
may I have been damming? may you have been damming? may she have been damming? may we have been damming? may you have been damming? may they have been damming?
Interro-negative form
Simple form
may I not dam? may you not dam? may she not dam? may we not dam? may you not dam? may they not dam?
V-ing form
may I not be damming? may you not be damming? may she not be damming? may we not be damming? may you not be damming? may they not be damming?
Perfect
may I not have dammed? may you not have dammed? may she not have dammed? may we not have dammed? may you not have dammed? may they not have dammed?
V-ing perfect
may I not have been damming? may you not have been damming? may she not have been damming? may we not have been damming? may you not have been damming? may they not have been damming?