Question

What is the preposition in "The riders trail began at St. Joseph, Missouri"

Answer 1

From the word itself, a preposition is a word added before the noun to express a relations with the rest of the words in the clause. In this sentence, the preposition used is the word 'at'. It connects the thought of riders trailing to the place in question. The preposition 'at' relates the noun riders to the noun St. Joseph, Missouri.