the search proved difficult ,这句话是怎么回事?difficult不是形容词吗?为什么可以这

prove作"证明是;结果是;事实说明"解时,用作连系动词,可用于以下句型:
prove+形容词
The handbook proved most useful.这本手册证明很有用.
The medicine proved satisfactory.结果证明这药疗效令人满意.
新概念英语第三册第一课的句子吧.
再问： 嗯，现在在自学 那有没有prove加副词的用法呢？
再答： 3.prove+介词短语或副词 Perhaps this book will prove of some use to you in your studies.也许这本书会对你的研究有用处. The power station was completed and proved up to standard.这座发电站建成了,证明质量符合标准. http://zhidao.baidu.com/question/335072700.html 自己看下好了