The correct spelling of the phrase "were ones case" can be explained using the International Phonetic Alphabet. "Were" is pronounced as /wər/ with a schwa sound at the beginning and the r sound at the end. "Ones" is pronounced as /wʌnz/ with a short u sound, and the n sound at the end is followed by a z sound. "Case" is pronounced as /keɪs/ with a long a sound followed by the s sound at the end. Put together, the phrase is pronounced as /wər wʌnz keɪs/.