He has already read several french books.
several 几个
french books 法语书
(注意区分,france book 是‘法国的书’的意思)
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He has already read several grammar books
He has already read several books in French.
He has already read several french books.
这里的"read”,不读read,与 “red”同音,是read的过去分词
He has already read several france books