I may bubble you may bubble he may bubble we may bubble you may bubble they may bubble
V-ing form
I may be bubbling you may be bubbling he may be bubbling we may be bubbling you may be bubbling they may be bubbling
Perfect
I may have bubbled you may have bubbled he may have bubbled we may have bubbled you may have bubbled they may have bubbled
V-ing perfect
I may have been bubbling you may have been bubbling he may have been bubbling we may have been bubbling you may have been bubbling they may have been bubbling
Negation
Simple form
I may not bubble you may not bubble he may not bubble we may not bubble you may not bubble they may not bubble
V-ing form
I may not be bubbling you may not be bubbling he may not be bubbling we may not be bubbling you may not be bubbling they may not be bubbling
Perfect
I may not have bubbled you may not have bubbled he may not have bubbled we may not have bubbled you may not have bubbled they may not have bubbled
V-ing perfect
I may not have been bubbling you may not have been bubbling he may not have been bubbling we may not have been bubbling you may not have been bubbling they may not have been bubbling
Interrogative form
Simple form
may I bubble? may you bubble? may he bubble? may we bubble? may you bubble? may they bubble?
V-ing form
may I be bubbling? may you be bubbling? may he be bubbling? may we be bubbling? may you be bubbling? may they be bubbling?
Perfect
may I have bubbled? may you have bubbled? may he have bubbled? may we have bubbled? may you have bubbled? may they have bubbled?
V-ing perfect
may I have been bubbling? may you have been bubbling? may he have been bubbling? may we have been bubbling? may you have been bubbling? may they have been bubbling?
Interro-negative form
Simple form
may I not bubble? may you not bubble? may he not bubble? may we not bubble? may you not bubble? may they not bubble?
V-ing form
may I not be bubbling? may you not be bubbling? may he not be bubbling? may we not be bubbling? may you not be bubbling? may they not be bubbling?
Perfect
may I not have bubbled? may you not have bubbled? may he not have bubbled? may we not have bubbled? may you not have bubbled? may they not have bubbled?
V-ing perfect
may I not have been bubbling? may you not have been bubbling? may he not have been bubbling? may we not have been bubbling? may you not have been bubbling? may they not have been bubbling?