Comma Errors

Original sentence 1:

The negative undertone of the word "shudder" suggests Raskolnikov's mild revulsion at this newfound love: namely, because he deems himself, a murderer, unworthy of loving such a good, pious girl as Sonia.

A colon can be used to introduce a list or a complete idea that exemplifies the previous sentence. Since, "because he deems himself unworthy" is a dependent clause, the colon would be inappropriate. Appropriate solutions would be to either replace the semicolon with a comma (and delete the unnecessary "namely"), or to keep the semicolon and remove the conjunction. To retain relatively short, easy-to-understand sentences, I chose the latter.

The negative undertone of the word "shudder" suggests Raskolnikov's mild revulsion at this newfound love: he deems himself, a murderer, unworthy of loving such a good, pious girl as Sonia.

Original sentence 2:

 In "The Allegory of the Cave," Plato asserts that knowledge is difficult to obtain, but once it has been reached it can never be relinquished.

Here, I need a "compounder" to separate the clause "but once it has been reached" from the separate clause "it can never be relinquished."

In "The Allegory of the Cave," Plato asserts that knowledge is difficult to obtain, but once it has been reached, it can never be relinquished. 

Original sentence 3:

Rather than submitting to Arnold's requests Connie fights back verbally and mentally.

I'm missing an "introducer" comma.

Rather than submitting to Arnold's requests, Connie fights back verbally and mentally.

Original sentence 4:

Briony, young and naive at the time she falsely accuses Robbie of rape naturally realizes the severity of her act as she ages and gains wisdom.

I need an "interrupter" comma to set "young and naive at the time she falsely accuses Robbie of rape" apart from the rest of the sentence.

Briony, young and naive at the time she falsely accuses Robbie of rape, naturally realizes the severity of her act as she ages and gains wisdom.

Original sentence 5:

Raskolnikov and Sonia's love therefore maintains their spirituality in addition to providing them with a reason to live.

I need a "finisher" comma here.

Raskolnikov and Sonia's love therefore maintains their spirituality, in addition to providing thej with a reason to live.

Original sentence 6:

Michael follows the pattern Coale describes in that he strains to achieve this truth yet ultimately loops back to his original self.

I need a finisher comma here, as well.

Michael follows the pattern Coale describes in that he strains to achieve this truth, yet ultimately loops back to his original self.

Original sentence 7:

When Marianne visits her older brother Patrick at his Cornell dorm room, she describes a phone call from her mother Corinne hinting that Michael may finally be ready to see his daughter.

I am missing interruptor commas to separate "Patrick" and "Corinne" from the rest of the sentence.

When Marianne visits her older brother, Patrick, at his Cornell dorm room, she describe a phone call from her mother, Corinne, hinting that Michael may finally be ready to see his daughter.

Original sentence 8:

When Raskolnikov visits Sonia’s apartment after disowning Pulcheria and Dunia he asks her to read him the story of Lazarus, then criticizes her choice of prostitution to support her family.

I need an introducer comma here.

When Raskolnikov visits Sonia’s apartment after disowning Pulcheria and Dunia, he asks her to read him the story of Lazarus, then criticizes her choice of prostitution to support her family.