Final answer:
The query involves applying proper comma usage in sentences, focusing on separating independent clauses, and using commas after introductory phrases. The corrections involve reassessment of where commas are essential for clarity and ease of reading, by identifying main clauses and list items.
Step-by-step explanation:
The student is asking about how to properly use commas in different sentences. For proper comma usage, it is essential to understand the basic rules such as separating independent clauses with a comma when they are joined by conjunctions like ‘and,’ ‘but,’ or ‘or,’ and using commas after introductory phrases or clauses. Let’s look at the provided sentences and correct them:
- I finally found my keys, and I got to work just in time.
- Mrs. Contreras threw out her old coffee table and cleaned the carpet.
- Taking the elevator to the roof, we hoped we could see the skyline and the bay.
- Though Susan wasn't feeling well, she went to the store anyway and bought ice cream, pizza, and candy.
- I let my neighbor borrow my phone because she said hers was tapped by the police.
In these corrections, we’ve eliminated unnecessary commas and added them where they were missing to clarify the meaning and improve readability. It's important to identify the main clauses and decide where the commas are necessary to separate them or to separate items in a list.