英语语法。求大神指点。

Question

there is a interesing book for Englishman that i read giving what he thought was a reason for American character.这个句子 that i read 作book的定于从句。但是有两个be动词怎么解释

Answer 1

主语：there is a interesing book for Englishman that i read giving what he thought
系动词：was
表语：a reason for American character

在拆分主语从句there is a interesing book for Englishman that i read giving what he thought
这是个there be引导的存在句，即倒装的主系表结构(sb/sth be there)
主语：a interesing book
定语：for Englishman that i read giving what he thought
这里面又有个定语从句，先行词：book，关系代词that在定语从句that i read中做宾语，而且这个that作宾语时通常可以省略
for Englishman也是book的定语，实际上它是插入成分造成定语从句和先行词book分开了
giving what he thought是现在分词短语作Englishman的定语，短语作定语时需要后置

翻译整句：有一本我读过的关于一个英国人给出他的看法的有趣的书解释了美国人的个性

Answer 2

there is an interesting book (...) {giving[what he thought was a reason for American character. 这是一句主语从句作give的宾语]}

Answer 3

哪两个Be，句子没有问题嘛