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