YOU SAID:

Place your arm on the table

INTO JAPANESE

テーブルの上に腕を置きます

BACK INTO ENGLISH

put your arms on the table

INTO JAPANESE

腕をテーブルの上に置く

BACK INTO ENGLISH

put one's arm on the table

INTO JAPANESE

腕をテーブルに乗せる

BACK INTO ENGLISH

put one's arm on the table