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