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it was（subsequently）discovered that several errors had been

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it was（subsequently）discovered that several errors had been made.（subsequent）为什么这里填副词,
不能填形容词呢?能说说这个区别和用法吗?还有It was这个句型的相关用法.
it was（subsequently）discovered that several errors had been
除了 系动词可以接 形容词 构成 系表结构 表状态
实义动词后面不能接形容词
只能用副词修饰谓语动词,副词放实义动词前面,情态动词或助动词后面
这里 是 被动语态 it was discovered 需要用副词subsequently修饰谓语动词,副词放助动词be 后面
再问： 那我可以这样理解吗？就是it is +adj.+to do 或是it is +adj.+of/for sb to do以外的句式，我都可以用it is+adv+v（过去式）呢？
再答： 可以这么理解 这是两个不同的句型 主 系 表 主 be 过去分词 (被动句) 没有形容词 系表结构 意思不完整，做句子表语，是句子主干 没有副词 被动句子 是完整的，副词是修饰成分，不是句子主干
it was（subsequently）discovered that several errors had been It was r____ that several people had been arrested. It was r___ that several people had been arrested. it was the first time that a female （had been elected） presi It was not for several years that I had an opportunity of se 有关英语的2道题.1、It was discovered （that they were endangered） in it is discovered that 英语翻译To my amazemnt,I discovered that not only had I been pai It wasn't long before she (discovered)____he had been lying It was 2 weeks ___ he got the news that his father had been It was the man who had been in prison that stole the money是不 It had been said that Lincoln was always ready to join in a