What words are prepositions

The following words are prepositions: about, after, at, before, behind, by, during, for, from, in, of, over, past, to, under, up.

Explanation:

they are prepositions because they can function as either adjective phrases or adverb phrases to modify other words in a sentence.

Words such as "in" "out" "around"

Explanation:

"the man on the platform," "she arrived after dinner,"