In the following paragraph, the third sentence contains yesterday, bill stopped at the library to pick up some books for his father. when he got to the library, the librarian could not find the books. (3) she looked for them for half an hour. she was embarrassed when she found that they had been put back on the shelves. two personal subject pronouns one personal and one possessive pronoun two personal pronouns (one subject pronoun and the other an object pronoun) two possessive pronouns (one plural pronoun and the other a singular pronoun)