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