四字格成语常运用音节的重复来增强表达效果，这种音节重复现象在修辞上称作重言叠韵。四字格成语重言叠韵的主要形式有：一AABC式这类成语前两字重叠，后两字不重叠。如：比比皆是头头是道历历在目井井有条蒸蒸日上落落大方济济一堂愤愤不平前两字重叠，重叠部分对后面的词语 Four-character idioms often use the repetition of syllables to enhance the expression effect, a syllable repetition phenomenon that is rhetorically called retending rhyming. The main forms of four-word idioms are the following: the first two words of AABC type overlap, the last two words do not overlap. Such as: abounding is the first line is a lingering in the forefront of orderly ups and downs Anger before the two words overlap, overlapping part of the back of the words