所以 suǒyǐ

1. suǒyǐ conjunction therefore / as a result / so
   Domain: Modern Chinese 现代汉语 , Subdomain: Function Words 虚词 , Concept: Correlative 关联词
   Notes: This conjunction is often used as a connecting word in the main clause of subordinate complex sentences. It is often used in the pattern 因为…，所以… to express cause and effect (Sun 2006, loc. 2053).
2. suǒyǐ phrase that by which
   Domain: Classical Chinese 古文
   Notes: In Literary Chinese this phrase is composed of two characters, in contrast with the single word 'therefore' in modern Chinese (Pulleyblank 1995, p. 50).

Word is mentioned most frequently in

Truncated for common words

Collection	Document Title	Occurrences
Commentaries on the Four Books by Zhu Xi 朱熹《四書章句集注》	《中庸章句》 Commentary on Doctrine of the Mean	83
Records of the Grand Historian 《史記》	《扁鵲倉公列傳》 Biographies of Bian Que and the Duke of Cang	34
The Book of Rites 《禮記》	《中庸》 The State of Equilibrium and Harmony, also known as the Doctrine of the Mean	31
Commentaries on the Four Books by Zhu Xi 朱熹《四書章句集注》	《離婁章句上》 Commentary on Li Lou I	28
Records of the Grand Historian 《史記》	《樂書》 Music	28
Records of the Grand Historian 《史記》	《書‧禮書》 Treatises - Rites	27
Commentaries on the Four Books by Zhu Xi 朱熹《四書章句集注》	《盡心章句上》 Commentary on Jin Xin I	24
The Book of Rites 《禮記》	《樂記》 Record of Music	21
Commentaries on the Four Books by Zhu Xi 朱熹《四書章句集注》	《滕文公章句上》 Commentary on Teng Wen Gong I	21
Commentaries on the Four Books by Zhu Xi 朱熹《四書章句集注》	《公孫丑章句上》 Commentary on Gong Sun Chou I	19