I forgot to include these other sentences. I really hope you can have a look at them, too.

1) The jungle had awakened his desires and he didn’t have enough strength to resist them.
2)They met a Russian who traded ivory. He looked like a harlequin in his highly coloured clothes with patches in them.
3) He struggled against the madness of his soul that, however, recognized no limits and had no faith in anything. His soul was struggling between his love of what he had discovered and the hatred for what he had discovered.
4) He looked out into the abyss that confronts us all in the end and commented “the horror”.
5) His last words were “the horror, the horror”. He had been defeated by his desires but in the end he had the courage to look at what had happened to him and was horrified by the sight.
6) He told her that Kurtz had loved her and that Kurtz’s last word had been her name.
"I've never got used to her cat". He said he had never got used to her cat.

1. comma after "desires"

You really need to get a handle on comma use, especially after introductory elements and in compound sentences.
http://grammar.ccc.commnet.edu/grammar/commas.htm
See #s 2 and 3.

5. Where is a comma needed here?

I don't know wat u r doing im sorry but i cant help u out.

Sure, here are the explanations for each of the sentences you provided:

1) To analyze this sentence, we need to understand that the subject "jungle" had awakened someone's desires. The person lacked enough strength to resist their desires. From the given information, it is not mentioned whose desires were awakened, but it can be guessed that it refers to the protagonist or a character in a story.

2) In this sentence, the characters in the story met a Russian who traded ivory. The Russian had a distinctive appearance as he was wearing highly colored clothes with patches on them, resembling the attire of a harlequin.

3) This sentence describes an inner struggle within a person's soul. The person is fighting against their own madness and desires. The person's soul is torn between their love for what they have discovered and their hatred for the same thing they found. It implies a conflict between conflicting emotions.

4) In this sentence, the person is gazing into an abyss, which symbolizes a metaphorical void or emptiness that confronts everyone in the end. Upon contemplating this emptiness, the person comments with the phrase "the horror." This suggests that the sight or realization of the abyss brings about a sense of horror or dread.

5) The protagonist's last words were "the horror, the horror." This implies that the character, after being defeated by their desires, gains the courage to face the consequences and look at what has happened to them. The sight of their own downfall horrifies them.

6) In this sentence, a character tells someone that another character named Kurtz had loved her. Furthermore, it is mentioned that Kurtz's last word was her name, indicating the significant role she played in his life or final moments.

Lastly, you mentioned the sentence "I've never got used to her cat." In this sentence, someone expresses the idea that they have never become accustomed to or comfortable with the presence of a specific cat. The speaker implies a lack of familiarity or ease around the cat.