Abstract: There are two forms of single-character adjective overlapping:AABB and ABAB,which are employed to develop simultaneously the meaning denoted by the adjective.This figure of  speech includes two conditions:joint narration and separate narration.The from of AABB is more commonly used than ABAB.The latter only exists in some single-character adjectives that can be used in the form of AABB.The overlapping of single-character adjectives is a way of creating new expressions.Mastering the rules of its usage may help advance word development.

Key words: single-character adjective, overlapping, simutaneous developent of meaning joint narration, separate narration