The thought of traveling across seas, fighting currents, and risking your life for research can seem like a wild adventure to the average person, well not me. I've spent the last five years searching the oceans high and low for answers to one of the greatest mysteries, The Titanic. The story starts as I step outside of my small Manhattan apartment, then only do my adventures begin.
First of all, it is important to define preposition phrase in order to find it in this sentence. We can say that "<span>a prepositional phrase will begin with a </span>preposition<span> and will end with a </span>noun<span>, </span>pronoun<span>, </span>gerund<span>, or </span>clause<span>, the "object" of the preposition"
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*In this case, we find UNTIL TODAY as the only prepositional phrase presented. until is the preposition and today is the noun.