Mechanics - Punctuation - Commas
Use commas to separate a series of three or more phrasesA phrase is a group of words used as a sentence part. It does not have a subject and a verb. It can be a noun, adjective, or adverb. Some common phrases are prepositional, gerund, participial, and infinitive. Source: Lesson 246.
He ran down the hall, out the door, and into the yard.
(The comma before the conjunctionA conjunction is a word that joins other words, phrases (groups of words), or clauses (groups of words with a subject and verb). Source: Lesson 77 and is optional, but I prefer using it.)
Use no commas in a series when all items are joined by or, and, or nor.
Instructions: Place commas where they are needed.
1. The rain splashed against the house onto the sidewalk and into the street.
2. Through the trees around the cabin and down the valley roared the wind.
3. College is to gain knowledge to make new friends and to prepare for a career.
4. The cat climbed up the tree and out on a limb and finally onto the roof.
-- no comma needed --
5. Munching on an apple listening to a recording and sitting on the couch Martha looked very happy.