In is a preposition.
<span>They are used before nouns, pronouns, or other substantives to form phrases functioning as modifiers of verbs, nouns, or adjectives, and that typically express a spatial, temporal, or other relationship as </span><span>in, on, by, to, <span>since.</span></span>
He went overboard , and swom to the nearest island
May we please see a picture, or else we have no idea. Thanks in advance