There are more than 100 prepositions in English. Yet this is a very small number when you think of the thousands of other words (nouns, verbs etc). Prepositions are important words. We use individual prepositions more frequently than other individual words. In fact, the prepositions of, to and in are among the ten most frequent words in English.
The name "preposition" (pre + position) means "place before". Prepositions usually come before another word, usually a noun or noun phrase:
If a preposition does not come before another word, it is still closely linked to another word:
Below are some pages with lists of prepositions and example sentences.
Many prepositions can also be adverbs:
A few prepositions can also be conjunctions:
See also: Prepositions grammar