Clear writing is more important than ever in today's technological age of email, online blogs and other electronic correspondence. Understanding the basics of English grammar, like the purpose and function of prepositional phrases, helps you avoid making grammar errors and, therefore, increases the effectiveness of your writing. Prepositions and prepositional phrases typically indicate time or space relationships between ideas. (See Reference 1)

Prepositions and Prepositional Phrases

Prepositions often give more information about location or time. Common prepositions include "above," "into" and "after." A prepositional phrase includes the preposition and its object, the noun or pronoun it relates to. For instance, "into the garage" is a prepositional phrase. (See References 1 and 2) A compound prepositional phrase begins with a compound preposition -- one made up of more than one word -- such as "according to," "in addition to" and "out of." A compound prepositional phrase begins with a compound preposition and continues through the object of that preposition. Examples include "according to the teacher," "in addition to the two boys" and "out of the ballpark." (See References 1 and 3)