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not all部分否定
all 的否定式：not all…（或：all…not）表示"并非都……"、"不是所有的都……"例如：
Not all men can be masters. (= All men cannot be masters.) 并非人人都能当头头。
Not all bamboo grows tall. 并非所有的竹子都会长得很高。
2.Two thousand years ago, the Greek doctor Hippocrates advised his patients to chew on the bark and leaves of the willow.
advise的用法
1)用作及物动词时，注意后接动名词 (不能直接跟不定式)或不定式的复合结构：
正：He advised leaving early. 他建议早点出发。
正：He advised us to leave early. 他建议我们早点出发。
误：He advised to leave early.
注意 advise 后接不定式复合结构时的被动语态形式 (不要与上面第一个句型混为一谈)：
He advised us to leave early. (主动式)
→We were advised to leave early. (被动式) (from www.hxen.com )
2)其后若接 that 从句，通常要用虚拟语气 (should＋v. )：
He advised that we (should) leave early. 他建议我们早点出发。
We advised that he should leave early. 我们建议他早点出发。
He advised that everyone should buy one. 他建议每人买一个。
