Write three sentences, each using a comma in a different way. Explain why the comma is needed in each sentence short it and make it look like a 8th grader

Answer 1

1. I invited Sarah, my best friend, to the party.
   The commas are used to set off "my best friend," which is extra information about Sarah.

2. Before we leave for the trip, we need to pack our bags.
   The comma separates the introductory phrase "Before we leave for the trip" from the main part of the sentence.

3. I want pizza, salad, and ice cream for dinner.
   The commas separate items in a list, making it clear that these are three different foods I want.