I may regret you may regret he may regret we may regret you may regret they may regret
V-ing form
I may be regreting you may be regreting he may be regreting we may be regreting you may be regreting they may be regreting
Perfect
I may have regreted you may have regreted he may have regreted we may have regreted you may have regreted they may have regreted
V-ing perfect
I may have been regreting you may have been regreting he may have been regreting we may have been regreting you may have been regreting they may have been regreting
Negation
Simple form
I may not regret you may not regret he may not regret we may not regret you may not regret they may not regret
V-ing form
I may not be regreting you may not be regreting he may not be regreting we may not be regreting you may not be regreting they may not be regreting
Perfect
I may not have regreted you may not have regreted he may not have regreted we may not have regreted you may not have regreted they may not have regreted
V-ing perfect
I may not have been regreting you may not have been regreting he may not have been regreting we may not have been regreting you may not have been regreting they may not have been regreting
Interrogative form
Simple form
may I regret? may you regret? may he regret? may we regret? may you regret? may they regret?
V-ing form
may I be regreting? may you be regreting? may he be regreting? may we be regreting? may you be regreting? may they be regreting?
Perfect
may I have regreted? may you have regreted? may he have regreted? may we have regreted? may you have regreted? may they have regreted?
V-ing perfect
may I have been regreting? may you have been regreting? may he have been regreting? may we have been regreting? may you have been regreting? may they have been regreting?
Interro-negative form
Simple form
may I not regret? may you not regret? may he not regret? may we not regret? may you not regret? may they not regret?
V-ing form
may I not be regreting? may you not be regreting? may he not be regreting? may we not be regreting? may you not be regreting? may they not be regreting?
Perfect
may I not have regreted? may you not have regreted? may he not have regreted? may we not have regreted? may you not have regreted? may they not have regreted?
V-ing perfect
may I not have been regreting? may you not have been regreting? may he not have been regreting? may we not have been regreting? may you not have been regreting? may they not have been regreting?