Grammar & Punctuation : When to Use a Comma With a Prepositional Phrase
Use a comma with a prepositional phrase if the phrase is non-restrictive, or if the prepositional phrase is being used as an introductory phrase. Avoid using a comma with a prepositional phrase if the sentence reads clearly without the comma. Learn more about comma usage with information from a writer and English tutor in this free video on grammar and punctuation.
Expert: Heather Kamins
Bio: Heather Kamins was diagnosed with lupus when she was 14 years old, and has dealt with kidney involvement, joint problems, medication side effects and other lupus-related issues.
Filmmaker: Dimitri LaBarge
