preposition+rules


 * Comma rules for prepositions: **


 * 1. Use a comma after a short introductory prepositional phrase (3 words or less) only if the sentence will be misread without it. **

Beside the window panes of glass rest against the wall. Beside the window, panes of glass rest against the wall.


 * 2. Use a comma after an introductory prepositional phrase (or group of phrases) that is 4 words or longer. **

During our class time tomorrow, we will review for the test. On top of the counter by the sugar, you will find the letter.


 * 3. Do NOT use a comma after an introductory prepositional phrase if it is followed by a VERB. **

Beside the green lamp next to the couch lies a valuable vase.


 * 4. Use commas to separate prepositional phrases that occur as part of items ** in a series. Note that this rule differs from introductory prepositional phrases!

We ran through the park, across the field, and into the baseball complex.