I may vibrate you may vibrate he may vibrate we may vibrate you may vibrate they may vibrate
V-ing form
I may be vibrating you may be vibrating he may be vibrating we may be vibrating you may be vibrating they may be vibrating
Perfect
I may have vibrated you may have vibrated he may have vibrated we may have vibrated you may have vibrated they may have vibrated
V-ing perfect
I may have been vibrating you may have been vibrating he may have been vibrating we may have been vibrating you may have been vibrating they may have been vibrating
Negation
Simple form
I mayn't vibrate you mayn't vibrate he mayn't vibrate we mayn't vibrate you mayn't vibrate they mayn't vibrate
V-ing form
I mayn't be vibrating you mayn't be vibrating he mayn't be vibrating we mayn't be vibrating you mayn't be vibrating they mayn't be vibrating
Perfect
I mayn't have vibrated you mayn't have vibrated he mayn't have vibrated we mayn't have vibrated you mayn't have vibrated they mayn't have vibrated
V-ing perfect
I mayn't have been vibrating you mayn't have been vibrating he mayn't have been vibrating we mayn't have been vibrating you mayn't have been vibrating they mayn't have been vibrating
Interrogative form
Simple form
may I vibrate? may you vibrate? may he vibrate? may we vibrate? may you vibrate? may they vibrate?
V-ing form
may I be vibrating? may you be vibrating? may he be vibrating? may we be vibrating? may you be vibrating? may they be vibrating?
Perfect
may I have vibrated? may you have vibrated? may he have vibrated? may we have vibrated? may you have vibrated? may they have vibrated?
V-ing perfect
may I have been vibrating? may you have been vibrating? may he have been vibrating? may we have been vibrating? may you have been vibrating? may they have been vibrating?
Interro-negative form
Simple form
mayn't I vibrate? mayn't you vibrate? mayn't he vibrate? mayn't we vibrate? mayn't you vibrate? mayn't they vibrate?
V-ing form
mayn't I be vibrating? mayn't you be vibrating? mayn't he be vibrating? mayn't we be vibrating? mayn't you be vibrating? mayn't they be vibrating?
Perfect
mayn't I have vibrated? mayn't you have vibrated? mayn't he have vibrated? mayn't we have vibrated? mayn't you have vibrated? mayn't they have vibrated?
V-ing perfect
mayn't I have been vibrating? mayn't you have been vibrating? mayn't he have been vibrating? mayn't we have been vibrating? mayn't you have been vibrating? mayn't they have been vibrating?