Interjections are words or phrases that express strong emotions or feelings. They are often used in exclamations.
Here are some examples of how "O" is used as an interjection:
* O, my goodness! (expressing surprise)
* O, how beautiful! (expressing admiration)
* O, woe is me! (expressing sadness)
Prepositional phrases, on the other hand, are groups of words that begin with a preposition and end with a noun or pronoun. They tell us where, when, how, or why something is happening.
Here are some examples of prepositional phrases:
* in the garden
* at the store
* with a smile
* for a reason