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