I may butter you may butter she may butter we may butter you may butter they may butter
V-ing form
I may be buttering you may be buttering she may be buttering we may be buttering you may be buttering they may be buttering
Perfect
I may have buttered you may have buttered she may have buttered we may have buttered you may have buttered they may have buttered
V-ing perfect
I may have been buttering you may have been buttering she may have been buttering we may have been buttering you may have been buttering they may have been buttering
Negation
Simple form
I mayn't butter you mayn't butter she mayn't butter we mayn't butter you mayn't butter they mayn't butter
V-ing form
I mayn't be buttering you mayn't be buttering she mayn't be buttering we mayn't be buttering you mayn't be buttering they mayn't be buttering
Perfect
I mayn't have buttered you mayn't have buttered she mayn't have buttered we mayn't have buttered you mayn't have buttered they mayn't have buttered
V-ing perfect
I mayn't have been buttering you mayn't have been buttering she mayn't have been buttering we mayn't have been buttering you mayn't have been buttering they mayn't have been buttering
Interrogative form
Simple form
may I butter? may you butter? may she butter? may we butter? may you butter? may they butter?
V-ing form
may I be buttering? may you be buttering? may she be buttering? may we be buttering? may you be buttering? may they be buttering?
Perfect
may I have buttered? may you have buttered? may she have buttered? may we have buttered? may you have buttered? may they have buttered?
V-ing perfect
may I have been buttering? may you have been buttering? may she have been buttering? may we have been buttering? may you have been buttering? may they have been buttering?
Interro-negative form
Simple form
mayn't I butter? mayn't you butter? mayn't she butter? mayn't we butter? mayn't you butter? mayn't they butter?
V-ing form
mayn't I be buttering? mayn't you be buttering? mayn't she be buttering? mayn't we be buttering? mayn't you be buttering? mayn't they be buttering?
Perfect
mayn't I have buttered? mayn't you have buttered? mayn't she have buttered? mayn't we have buttered? mayn't you have buttered? mayn't they have buttered?
V-ing perfect
mayn't I have been buttering? mayn't you have been buttering? mayn't she have been buttering? mayn't we have been buttering? mayn't you have been buttering? mayn't they have been buttering?