What are the prepositions in the sentence, early this morning we set the instruments on the table and now we're waiting for our teacher

A preposition is a word that is used to relate a noun or pronoun to another word, clause or phrase. Usually, a preposition precedes the noun or pronoun. In the given sentence, the prepositions used are "on" and "for". The preposition "on" precedes the noun table. And the preposition "for" precedes the pronoun "our".