Question

求解析2个英文句子

1、Aluminum are remained unknown until the nineteenth century, because nowhere in nature is it found free, owing to its always being combined with other elements, most commonly with oxygen, for which it has strong affinity.
疑惑： 不明白“because nowhere in nature is it found free, owing to its always being combined with other elements,”在这句话里，is it found free是什么结构？ owing to是现在分词做定语从句吗？
2、On the whole such a conclusion can be drawn with a certain degree of confidence but only if the child can be assumed to have had the same attitude towards the test as the other with whom he is being compared,and only if he was not punished by lack of relevant information which they possessed.
疑惑：“to have had",have had在这里怎么理解？"with whom he is being compared", is being compared，怎么理解？

感谢大神帮忙剖析下呢！

Answer 1

1. because nowhere in nature is it found free, 当用nowhere前置时，系动词is提前，构成倒装句。owing to its always being combined with other elements, ... 分词短语做原因状语：因为其（aluminum）总是与其它元素结合在一起。

2. “to have had" 做动词不定式的完成式， 翻译为“具有/具备”。"with whom he is being compared", is being compared做被动时态的现在进行时：将他与其他孩子进行比较。