谁能帮我分析下这个句子是什么从句?The primary reason was skepticism

谁能帮我分析下这个句子是什么从句?The primary reason was skepticism

同位语从句主句:The primary reason was skepticism.that从句做skepticism的同位语,具体说明skepticism.that从句主干a railroad could pay a profit.其他的都是用来修饰railroad...过去分词短语做后置定语修饰railroad.常见的同位语从句先行词是news,idea,fact,promise,question,doubt,thought,hope,message,suggestion,words（消息）,possibility等.这些都是抽象名词,你的这个例子中skepticism,怀疑态度也是抽象名词.同位语从句的特点是,你可以去掉先行词,句子仍然成立,没有语法错误.这里The primary reason was that a railroad built through so challenging and thinly settled a stretch of desert,mountain,and semiarid plain could pay a profit.无错误.所以原句是同位语从句.======以下答案可供参考======供参考答案1:that后引导的从句是表语从句，修饰skepticism;so adj. a sth.(or sth.)是固定结构；整句翻译为：根本原因在于对这点持怀疑态度，那就是：已建成的穿越如此具有挑战性的、人烟稀少的、广泛延伸的荒原（或沙漠）、山岭、半干旱平原地带能否支付建设期利润。

正好我需要

如以上回答内容为低俗、色情、不良、暴力、侵权、涉及违法等信息，可以点下面链接进行举报！

点此我要举报以上问答信息