请帮我分析这个句子的语法结构

请帮我分析一下这个句子的语法：

One of the very easy things that any college can do is buy their produce form a local farmer's market and serve organic，whenever possible.

你提供的句子似乎有误，我给修改了一下，是否这样：

One of the very easy things that any college can do is buy their produce from a local farmer's market and serve organic food, whenever possible.

如果是这样，那么句子成分如下：

1. One of the very easy things that any college can do：主语。其中 that any college can do是定语从句，修饰 things。

2. is：系动词。

3. buy their produce from a local farmer's market and serve organic food：是两个并列的动词不定式作表语，to 被省略。

4. whenever possible：时间状语从句，修饰动词不定式。

刘永科 - 教育出版集团英语总顾问 & 英语系列图书主编

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