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　　本句是一个复合句，主句是middle school teacher' gossip about their principal became so poisonous.其中about their principal介词短语作后置定语，修饰gossip。后面that引导结果状语从句，与so相呼应。前面in one case...journal介词短语作状语，其中analyzed in a scholarly journal过去分词短语作后置定语，修饰case。

　　语法重点：介词短语作状语，介词短语作定语，结果状语从句

　　2. Gossip helps us analyze the motivations of other people, and enables those low on the food chain, in particular, to understand how power is used in their organizations, says this New York Times article.

　　本句是一个复合句。 says前面的成分充当says的宾语。其中 analyze...other people是help的宾语补足语。to understand... organizations不定式短语作enables的宾语补足语。其中bow引导名词性从句，作understand的宾语。

　　语法重点：宾语从句，宾语补足语

　　3. I have seen gossip he1p co-workers in some places where I have work, giving rise to compassion or offers of support when someone is going though hard times.

　　本句是一个复合句。gossip help co-workers in some places where I have worked是省略了引导词的宾语从句，作seen的宾语，其中where引导限制性定语从句，修饰place。giving rise to...hard times现在分词短语作结果状语。其中when引导时间状语从句。

　　语法重点：宾语从句，定语从句，分词短语作状语，时间状语从句