I may decease you may decease she may decease we may decease you may decease they may decease
V-ing form
I may be deceasing you may be deceasing she may be deceasing we may be deceasing you may be deceasing they may be deceasing
Perfect
I may have deceased you may have deceased she may have deceased we may have deceased you may have deceased they may have deceased
V-ing perfect
I may have been deceasing you may have been deceasing she may have been deceasing we may have been deceasing you may have been deceasing they may have been deceasing
Negation
Simple form
I may not decease you may not decease she may not decease we may not decease you may not decease they may not decease
V-ing form
I may not be deceasing you may not be deceasing she may not be deceasing we may not be deceasing you may not be deceasing they may not be deceasing
Perfect
I may not have deceased you may not have deceased she may not have deceased we may not have deceased you may not have deceased they may not have deceased
V-ing perfect
I may not have been deceasing you may not have been deceasing she may not have been deceasing we may not have been deceasing you may not have been deceasing they may not have been deceasing
Interrogative form
Simple form
may I decease? may you decease? may she decease? may we decease? may you decease? may they decease?
V-ing form
may I be deceasing? may you be deceasing? may she be deceasing? may we be deceasing? may you be deceasing? may they be deceasing?
Perfect
may I have deceased? may you have deceased? may she have deceased? may we have deceased? may you have deceased? may they have deceased?
V-ing perfect
may I have been deceasing? may you have been deceasing? may she have been deceasing? may we have been deceasing? may you have been deceasing? may they have been deceasing?
Interro-negative form
Simple form
may I not decease? may you not decease? may she not decease? may we not decease? may you not decease? may they not decease?
V-ing form
may I not be deceasing? may you not be deceasing? may she not be deceasing? may we not be deceasing? may you not be deceasing? may they not be deceasing?
Perfect
may I not have deceased? may you not have deceased? may she not have deceased? may we not have deceased? may you not have deceased? may they not have deceased?
V-ing perfect
may I not have been deceasing? may you not have been deceasing? may she not have been deceasing? may we not have been deceasing? may you not have been deceasing? may they not have been deceasing?