A prepositional phrase is a group of words (not a complete sentence) that has a preposition, an object, and any modifiers of the object. Prepositions are words that show relationships between the object and some other word in the sentence. Some common prepositions are listed below:
About Before During Toward With
Above Beside Under Up Behind
Across Between In On Below
After Against Into Near Down
Along Within Over For
Among Without Of From
Around Beneath Off Except
At Through To By
Prepositional phrases act like adjectives or adverbs in a sentence. Remember that an adjective modifies a noun or pronoun, and an adverb modifies a verb, an adjective, or an adverb.
For example:
The wolf in the next room wants to become a vegetarian. (modifies wolf)
The snorting dragon in the cave has a toothache. (modifies dragon)
The ranting ogre flung the mug across the room. (modifies flung)
The dimpled dragon blew smoke through his teeth. (modifies blew)
Click here for a presentation about prepositions