A preposition is a word placed before a noun or pronoun to form a phrase modifying another word in the sentence. The prepositional phrase nearly always functions as an adjective or as an adverb.
To the summit functions as an adjective modifying the noun road; past craters functions as an adverb modifying the verb travels; from an extinct volcano functions as an adjective modifying the noun craters.
There are a limited number of prepositions in English. The most common are included in the chart.
Some prepositions are more than one word long. Along with, as well as, in addition to, and next to are common examples. Phrases beginning with these prepositions do not make a singular subject plural. See Subject-verb agreement.
Prepositions are also used in idioms such as capable of and dig up.
Common idioms
Common prepositions
Exercises:
All parts of speech 1
All parts of speech 2
Related topics:
Prepositional phrase
Adjective + preposition combinations
Verb + preposition combinations
Subject-verb agreement with prepositional phrases
Using standard idioms