I assume you mean the three tenses, but let me know if you need more.
Past Tense: "Birds flew in the sky."
Future Tense: "Birds will fly in the sky."
The sentence is already in the present tense.
(A) stream of consciousness
The stream of consciousness is a relatively new literary technique used by modern writers in which the writer takes a reader into the mind of the character and is allowed insight into his/her conscious and unconscious thoughts and desires. The fragmented sentences are used to represent the way thoughts keep jumping about in our minds.
Leota had to be upset that Mrs.Pike turned against her so her mind changed from being excited to being upset. It says that Leota is not mindful of her friends that she makes.