I may bur you may bur she may bur we may bur you may bur they may bur
V-ing form
I may be buring you may be buring she may be buring we may be buring you may be buring they may be buring
Perfect
I may have bured you may have bured she may have bured we may have bured you may have bured they may have bured
V-ing perfect
I may have been buring you may have been buring she may have been buring we may have been buring you may have been buring they may have been buring
Negation
Simple form
I may not bur you may not bur she may not bur we may not bur you may not bur they may not bur
V-ing form
I may not be buring you may not be buring she may not be buring we may not be buring you may not be buring they may not be buring
Perfect
I may not have bured you may not have bured she may not have bured we may not have bured you may not have bured they may not have bured
V-ing perfect
I may not have been buring you may not have been buring she may not have been buring we may not have been buring you may not have been buring they may not have been buring
Interrogative form
Simple form
may I bur? may you bur? may she bur? may we bur? may you bur? may they bur?
V-ing form
may I be buring? may you be buring? may she be buring? may we be buring? may you be buring? may they be buring?
Perfect
may I have bured? may you have bured? may she have bured? may we have bured? may you have bured? may they have bured?
V-ing perfect
may I have been buring? may you have been buring? may she have been buring? may we have been buring? may you have been buring? may they have been buring?
Interro-negative form
Simple form
may I not bur? may you not bur? may she not bur? may we not bur? may you not bur? may they not bur?
V-ing form
may I not be buring? may you not be buring? may she not be buring? may we not be buring? may you not be buring? may they not be buring?
Perfect
may I not have bured? may you not have bured? may she not have bured? may we not have bured? may you not have bured? may they not have bured?
V-ing perfect
may I not have been buring? may you not have been buring? may she not have been buring? may we not have been buring? may you not have been buring? may they not have been buring?