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 mayn't regret you mayn't regret he mayn't regret we mayn't regret you mayn't regret they mayn't regret
V-ing form
I mayn't be regreting you mayn't be regreting he mayn't be regreting we mayn't be regreting you mayn't be regreting they mayn't be regreting
Perfect
I mayn't have regreted you mayn't have regreted he mayn't have regreted we mayn't have regreted you mayn't have regreted they mayn't have regreted
V-ing perfect
I mayn't have been regreting you mayn't have been regreting he mayn't have been regreting we mayn't have been regreting you mayn't have been regreting they mayn't 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
mayn't I regret? mayn't you regret? mayn't he regret? mayn't we regret? mayn't you regret? mayn't they regret?
V-ing form
mayn't I be regreting? mayn't you be regreting? mayn't he be regreting? mayn't we be regreting? mayn't you be regreting? mayn't they be regreting?
Perfect
mayn't I have regreted? mayn't you have regreted? mayn't he have regreted? mayn't we have regreted? mayn't you have regreted? mayn't they have regreted?
V-ing perfect
mayn't I have been regreting? mayn't you have been regreting? mayn't he have been regreting? mayn't we have been regreting? mayn't you have been regreting? mayn't they have been regreting?