Personal Pronouns

What are Personal Pronouns?
They are the following:

                                                        Source: English for SMK 1 (2008)

The other pronouns are Reflexive pronouns: myself, yourself/yourselves, himself, herself, itself, ourselves, themselves, herself, himself, and themselves.

Look at the following picture to try to understand the use of pronouns

                                         Source: Facebook Page of English as Second Language

We use pronoun I, You, etc (in the first column) to replace noun as Subject. For example, one of above sentence "John is talking to himself." can become "He is talking to himself."
The word "John" is replaced with "He" not "His", "Him" nor "Himself" because word "John" in the sentence is a subject. Therefore, word "John" is replaced with pronoun as subject that is "He".

Look at other examples below

#        Saya bertemu dia (perempuan). >> I meet her.
     
'I' is used because 'saya' is a subject. 'her' is used from column object because 'dia' is an object.

#     Itu adalah buku saya. >> That is my book.
       Buku saya berwarna ungu. >> My book is purple.

"My" is used to show the owner of the noun that follow the word "my".

#       Buku yang ungu adalah milik saya. >> The purple book is mine.

"mine" is used because it is followed by the noun.

#       Dia membuat kue itu sendiri. >> She makes the cake herself.




References:

Pramesti, M. R. D, Pramono, W. S. & Suhermawan. (2008). English for SMK 1: Grade X. Jakarta: Pusat  
         Perbukuan, Departemen Pendidikan Nasional.