Final answer:
The subject matter is English grammar, specifically comma usage in sentences, suitable for a high school student. The process involves identifying where commas are needed for clarity or removing them when they are not necessary.
Step-by-step explanation:
The exercise presented requires the student to review sentences and correct them by adding or removing commas where necessary. This topic falls under English grammar, which is essential for establishing clear communication in writing. Let's examine some of these sentences closely.
- In the sentence, 'I finally found my keys and I got to work just in time,' a comma is not necessary because both clauses are short and closely related.
- For 'Mrs. Contreras threw out her old coffee table, and cleaned the carpet,' the comma before 'and' should be omitted because 'cleaned the carpet' is not an independent clause.
- 'Taking the elevator to the roof we hoped we could see the skyline, and the bay.' In this sentence, a comma should be placed after 'roof' to separate the introductory phrase from the main clause, and the comma before 'and' should be removed.
- 'Though Susan wasn't feel well she went to the store anyway and bought ice cream pizza, and candy.' Firstly, 'feel' should be corrected to 'feeling.' Then, a comma should be added after 'well' as it is an introductory subordinate clause, and the comma after 'pizza' should be removed.
- The sentence 'I let my neighbor borrow my phone, because she said hers was tapped by the police.' does not require the comma before 'because' as it is not separating two independent clauses.
It's vital to have a good grasp of comma usage because it can affect the clarity and meaning of sentences significantly. Practicing punctuation rules helps to give more words precision and readability, enhancing the 1000word or more essays and narratives we compose.