有一个句子we differentiatebetween fruit and vegetable based on the parts of the plant we eat.汉语字幕意思是大家依据所吃植物的部位来区别水果还是蔬菜。
这句话中based的词性我有的疑惑，假如说是动词，那这句话中就有differentiate和base两处动词了，应该不合语法。假如说是形容词，那形容词又不可以修饰前面动词differentiate。请老师帮助剖析这个问题。
We differentiatebetween fruit and vegetable based on the parts of the plant we eat.
based on the partsof the plant we eat 是过去分词短语作方法状语，修饰谓语动词 differentiate。
又如：
We can't make a decision based on hearsay and guesswork. （作状语）
大家不可以依据传言和猜测作决定。
《牛津词典》
Any economicstrategy based on a weak dollar is destined to fail. （作定语）
任何基于疲软的USD之上的经济方案都注定会失败。
《柯林斯英汉双解大词典》
