壹、前言
《離騷》中「以」的用法，可以歸納為介詞、連詞、副詞和動詞四類。
貳、「以」的用法
一、介詞
可再細分為兩種：一、「以」當介詞，和後面的賓語組成介賓結構，用在動詞後面作補語；二、「以」當介詞，和後面的賓語組成介賓結構，用在動詞前面作狀語。
二、連詞
「以」當連詞，連接前後相關的兩項，具各各種不同的關係：
一、表示並列；二、表示承接；三、表示遞進；四、表示目的；五、表示原因；六、表示修飾；七、表示轉折。
三、副詞
「以」當副詞，修飾後面的動詞、形容詞。
四、動詞
「以」當動詞，表示在潛意識中一種確認、判斷的心理活動。
參、結論
《離騷》三百七十三周中，由「以」字組成的共七十七句，佔了五分之一強，由此可知「以」字在《離騷》中的重要性。

　　　　　The uses of "Yi" in "Li-Sau" comprise of the four categories: preposition, connective, adverb, and verb.
1.PREPOSITON
When "Yi" is used as a preposition, it combines with a predicate to form the preposition-predicate structure after a verb. This structure would be either a complement or an adverbial modifier.
2.CONNECTIVE
"Yi" as a connective can associate the antecedent with the consequent to mean: (1)a juxtaposition; (2)a continuation; (3)an extension; (4)a goal; (5)a reason; (6)a modification; and (7)a transition.
3.ADVERB
"Yi" as an adverb can quality a trailing verb or adjective.
4.VERB
"Yi" as a verb represents a subconsious action such as judgment or confirmation.
Statistically, there are 77 sentences consist of the word "Yi" in a total of 373 sentences from "Li-Sau". The importance of "Yi" in "Li-Sau" is obviously vindicated from this 20%+ percentage.