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