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