I may understand you may understand she may understand we may understand you may understand they may understand
V-ing form
I may be understanding you may be understanding she may be understanding we may be understanding you may be understanding they may be understanding
Perfect
I may have understood you may have understood she may have understood we may have understood you may have understood they may have understood
V-ing perfect
I may have been understanding you may have been understanding she may have been understanding we may have been understanding you may have been understanding they may have been understanding
Negation
Simple form
I may not understand you may not understand she may not understand we may not understand you may not understand they may not understand
V-ing form
I may not be understanding you may not be understanding she may not be understanding we may not be understanding you may not be understanding they may not be understanding
Perfect
I may not have understood you may not have understood she may not have understood we may not have understood you may not have understood they may not have understood
V-ing perfect
I may not have been understanding you may not have been understanding she may not have been understanding we may not have been understanding you may not have been understanding they may not have been understanding
Interrogative form
Simple form
may I understand? may you understand? may she understand? may we understand? may you understand? may they understand?
V-ing form
may I be understanding? may you be understanding? may she be understanding? may we be understanding? may you be understanding? may they be understanding?
Perfect
may I have understood? may you have understood? may she have understood? may we have understood? may you have understood? may they have understood?
V-ing perfect
may I have been understanding? may you have been understanding? may she have been understanding? may we have been understanding? may you have been understanding? may they have been understanding?
Interro-negative form
Simple form
may I not understand? may you not understand? may she not understand? may we not understand? may you not understand? may they not understand?
V-ing form
may I not be understanding? may you not be understanding? may she not be understanding? may we not be understanding? may you not be understanding? may they not be understanding?
Perfect
may I not have understood? may you not have understood? may she not have understood? may we not have understood? may you not have understood? may they not have understood?
V-ing perfect
may I not have been understanding? may you not have been understanding? may she not have been understanding? may we not have been understanding? may you not have been understanding? may they not have been understanding?