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