I may database you may database she may database we may database you may database they may database
V-ing form
I may be databasing you may be databasing she may be databasing we may be databasing you may be databasing they may be databasing
Perfect
I may have databased you may have databased she may have databased we may have databased you may have databased they may have databased
V-ing perfect
I may have been databasing you may have been databasing she may have been databasing we may have been databasing you may have been databasing they may have been databasing
Negation
Simple form
I may not database you may not database she may not database we may not database you may not database they may not database
V-ing form
I may not be databasing you may not be databasing she may not be databasing we may not be databasing you may not be databasing they may not be databasing
Perfect
I may not have databased you may not have databased she may not have databased we may not have databased you may not have databased they may not have databased
V-ing perfect
I may not have been databasing you may not have been databasing she may not have been databasing we may not have been databasing you may not have been databasing they may not have been databasing
Interrogative form
Simple form
may I database? may you database? may she database? may we database? may you database? may they database?
V-ing form
may I be databasing? may you be databasing? may she be databasing? may we be databasing? may you be databasing? may they be databasing?
Perfect
may I have databased? may you have databased? may she have databased? may we have databased? may you have databased? may they have databased?
V-ing perfect
may I have been databasing? may you have been databasing? may she have been databasing? may we have been databasing? may you have been databasing? may they have been databasing?
Interro-negative form
Simple form
may I not database? may you not database? may she not database? may we not database? may you not database? may they not database?
V-ing form
may I not be databasing? may you not be databasing? may she not be databasing? may we not be databasing? may you not be databasing? may they not be databasing?
Perfect
may I not have databased? may you not have databased? may she not have databased? may we not have databased? may you not have databased? may they not have databased?
V-ing perfect
may I not have been databasing? may you not have been databasing? may she not have been databasing? may we not have been databasing? may you not have been databasing? may they not have been databasing?