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