Write three sentences, each using a comma in a different way. Explain why the comma is needed in each sentence.

Answer 1

1. I went to the store, but it was closed when I arrived.
   Explanation: The comma is needed before "but" because it connects two independent clauses. Each clause can stand alone as a complete sentence, so the comma clarifies the separation while indicating the relationship between the two thoughts.

2. After a long day at work, I enjoy relaxing with a good book.
   Explanation: The comma is necessary after the introductory phrase "After a long day at work" to separate it from the main clause. This helps the reader understand that the introductory phrase sets the context for the main action of the sentence.

3. My sister, who lives in New York, is visiting us next week.
   Explanation: The commas are used to enclose the non-restrictive clause "who lives in New York," which adds extra information about the sister but is not essential to the meaning of the main clause. The sentence would still be complete and clear without this information, so the commas indicate that it can be omitted without changing the main idea.