The (state) of his health prevented him from working.为什么用from

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The (state) of his health prevented him from working.为什么用from

The (state) of his health prevented him from working.为什么用from
The (state) of his health prevented him from working.为什么用from

The (state) of his health prevented him from working.为什么用from
固定用法 prevent ...from...阻止……做……
意思;他的健康状况不充许他工作.

prevent from 阻止···做···
是一个词组
固定搭配
习惯用法
不这么用就不对。。
整句话是
他的健康状况让他没办法上班的意思

语言这东西,说句实话,不要问为什么,就像汉语中的惯用法, “刻舟求剑” ,就是刻舟求剑, 而不是 刻舟求“刀” ,明白? 惯用法,大家都用,你也跟着用就行了,这叫 约定俗成 !!!
prevent----from----, 固定搭配 !!

prevent sb from sth ,是一个固定搭配。