Prepositions stand before nouns to link the noun to other parts of the sentence. The noun that follows the preposition is the object of the preposition. Prepositions can be explain by how they show position, as in, “I went to the table to….” (the previous shows in a real way). “Beyond that, I have no idea where it went.” (in this previous example, the preposition, “beyond” is in the abstract).
Example: Start a sentence with a Prepositional Phrase.
To all his friends, Mark was the only one to trust.
For the last six years, Maryann labored to raise her grades.
From year to year, the economy improved substantially.
