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