Чем отличается фольклорная песня от других

1.  Mother said that she would put  a book into my briefcase in case I  wanted to read it 2. He said that If she followed his advice, all would  turn out well  3. Pete thought that  Annette would  have come to Paris in an hour if there were no delays.   4. The manager said  that those  letters must be sent immediately as soon as they were translated  5. He said to his dog that  he would  take him  out for a walk after he had  seen the film. 6. He whispered that he was  sure she would sing to them   provided they  asked  her 7. The trainer said that If she trained  hard she would  win the cup. 8. The doctor said to the mother that If she stayed in bed for a couple of days,she would  be all right in a week9. He said to me that If the train came  on time they  would  be able to see the football math 10. She said that  she wouldn’t  come if she was  not invited 

фольклорная - русская народная песня к примеру колядки. 

фольклор -это нородная песня, а остальные это авторские