Which one is correct? And why? After hearing/hear I/me sing/to sing/singing.?

After---preposition
hearing-----verbal noun as object
me----indirect object as pronoun
sing-----object as present tense infinitive as object complement
(not my singing-----verbal noun;too much verbal noun;
--to sing----infinitive case;not direct object, or object complement)
eg:-After hearing me sing , her hearing impaired seriously !!!!!
------She was not able to hear well ,having an earache !!!!!

After hearing me sing, ....

After (he/she) hears me singing...
應該要在After 和 Hears 中間加一個主語。

After hearing I singing
Afer "在某一事物之後"，此事物之性質為名詞，故hear須改為動名詞，使具名詞的詞性。
而"聽到我唱歌"之"我唱歌"是一件事，如同上列說明，應具有名詞詞性，故sing應使用動名詞singing。
又hear之受詞為I singing這件事，非僅 I 字，故 I 不應是受詞，應是主詞形態。

After hearing me singing ...
介系詞after＋動名詞hearing（當介系詞after的受詞）＋受格代名詞me（當動名詞hearing的受詞）＋現在分詞（當受詞補語）