Sounds kind of like "j" in English "jeep", but with the tip of the tongue behind the lower teeth.

Sounds kind of like "ch" in English "cheap", but with the tip of the tongue behind the lower teeth.

Sounds kind of like "sh" in English "sheep", but with the tip of the tongue behind the lower teeth.

Single-syllable audio courtesy of the AllSet Learning Chinese Pronunciation Wiki, used with permission.

HSK word audio courtesy of Audio-cmn. (CC BY-SA 3.0)