Understanding Prepositions: Identifying 'Beside' in Sentences

The preposition in the sentence "The doctor stood beside his bed" is "beside".

A preposition is a word that shows the relationship between a noun or pronoun and another word in the sentence. In this case, the preposition "beside" is showing the relationship between the noun "doctor" and the noun "bed". It is telling us that the doctor is standing next to the bed.