I may best you may best he may best we may best you may best they may best
V-ing form
I may be besting you may be besting he may be besting we may be besting you may be besting they may be besting
Perfect
I may have bested you may have bested he may have bested we may have bested you may have bested they may have bested
V-ing perfect
I may have been besting you may have been besting he may have been besting we may have been besting you may have been besting they may have been besting
Negation
Simple form
I may not best you may not best he may not best we may not best you may not best they may not best
V-ing form
I may not be besting you may not be besting he may not be besting we may not be besting you may not be besting they may not be besting
Perfect
I may not have bested you may not have bested he may not have bested we may not have bested you may not have bested they may not have bested
V-ing perfect
I may not have been besting you may not have been besting he may not have been besting we may not have been besting you may not have been besting they may not have been besting
Interrogative form
Simple form
may I best? may you best? may he best? may we best? may you best? may they best?
V-ing form
may I be besting? may you be besting? may he be besting? may we be besting? may you be besting? may they be besting?
Perfect
may I have bested? may you have bested? may he have bested? may we have bested? may you have bested? may they have bested?
V-ing perfect
may I have been besting? may you have been besting? may he have been besting? may we have been besting? may you have been besting? may they have been besting?
Interro-negative form
Simple form
may I not best? may you not best? may he not best? may we not best? may you not best? may they not best?
V-ing form
may I not be besting? may you not be besting? may he not be besting? may we not be besting? may you not be besting? may they not be besting?
Perfect
may I not have bested? may you not have bested? may he not have bested? may we not have bested? may you not have bested? may they not have bested?
V-ing perfect
may I not have been besting? may you not have been besting? may he not have been besting? may we not have been besting? may you not have been besting? may they not have been besting?