So curious was the boy about the experiment that he asked for questions endless his father about it

这是一个倒装句请具体说一下结构，怎么倒装的这是so......that句型的倒装，表示强调，这句话其实可以变成这样：Theboywas so curious aboutthe experiment thathe askedfor questionsendlesshis father about it。结构：so +形容词+谓语动词+句子其他部分。