推荐回答（3个）
你能不能说下你的具体问题是什么啊？哪里不明白？
我觉得书里的解释已经比较清楚了。
法语里的代词一般都要放到动词的前面这个你知道么？如果知道那就好说了，这个en在你说的这种情况下就是个代词，代前文提到过的不定冠词或部分冠词，用的时候提前就行了，而且“提前”的意思就是提到动词之前，如果有助动词那就提到助动词之前。如果你不知道 代词要提前 的话，那我建议先把这部分放一放，继续往后学习，你会发现往后你会见到大量的代词提前的语法内容，到时候见多了再回来看这部分你自然就明白了。
形容词放在名词前 冠词des要变成de
例如de beaux magasins des变成de
但名词和形容词组成复合名词
如des jeunes gens
则不变
应该是Des。
不过不应该是j'ai bu des bons vins en l'annee 1986么……
哦，对了。
en只能替换任何名词前面有de,du,d', des, de la的东西。
object pronoun有le la les l' lui leur y en
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