N1 + や + N2
and, among others (partial list)
Joins nouns in a non-exhaustive list, implying there are more items. Often paired with など (etc.).
机の上に本やペンがあります。
つくえのうえに ほんや ペンが あります。
There are books, pens, and so on, on the desk.
Which pattern is each sentence using?
机の上に本やペンがあります。
There are books, pens, and so on, on the desk.