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