I may burp you may burp he may burp we may burp you may burp they may burp
V-ing form
I may be burping you may be burping he may be burping we may be burping you may be burping they may be burping
Perfect
I may have burped you may have burped he may have burped we may have burped you may have burped they may have burped
V-ing perfect
I may have been burping you may have been burping he may have been burping we may have been burping you may have been burping they may have been burping
Negation
Simple form
I may not burp you may not burp he may not burp we may not burp you may not burp they may not burp
V-ing form
I may not be burping you may not be burping he may not be burping we may not be burping you may not be burping they may not be burping
Perfect
I may not have burped you may not have burped he may not have burped we may not have burped you may not have burped they may not have burped
V-ing perfect
I may not have been burping you may not have been burping he may not have been burping we may not have been burping you may not have been burping they may not have been burping
Interrogative form
Simple form
may I burp? may you burp? may he burp? may we burp? may you burp? may they burp?
V-ing form
may I be burping? may you be burping? may he be burping? may we be burping? may you be burping? may they be burping?
Perfect
may I have burped? may you have burped? may he have burped? may we have burped? may you have burped? may they have burped?
V-ing perfect
may I have been burping? may you have been burping? may he have been burping? may we have been burping? may you have been burping? may they have been burping?
Interro-negative form
Simple form
may I not burp? may you not burp? may he not burp? may we not burp? may you not burp? may they not burp?
V-ing form
may I not be burping? may you not be burping? may he not be burping? may we not be burping? may you not be burping? may they not be burping?
Perfect
may I not have burped? may you not have burped? may he not have burped? may we not have burped? may you not have burped? may they not have burped?
V-ing perfect
may I not have been burping? may you not have been burping? may he not have been burping? may we not have been burping? may you not have been burping? may they not have been burping?