Question

英语语法问题！？！

what the chemical process is that's causing it.
表语从句中that不是不做成分吗，那后面that's causing it.里面的that为什么作主语？是因为它省略了一个that吗 what the chemical process is（that） that's causing it.？？？

Answer 1

that引导表语从句的时候，是不充当任何成分。而且也不能省略。所以这个句子是错误的。少了一个that。

Answer 2

这句话中并没有表语从句，that's causing it是定语从句，修饰名词短语chemical process，that在从句中作主语，这里也没有省略另一个that，因为它是关系代词。将这个句子语序调整为what the chemical process (that's causing it) is你就能看明白了，另外注意这个句子采用了陈述句语气，说明它整个仍然是另一个复合句的从句。

Answer 3

What the chemical process is that is causing it. = What the chemical process is is causing it. = That is What the chemical process is causing it.= The chemical process  is causing it.

化学过程就是导致它的原因。= 化学过程正导致它（发生）。

What the chemical process is 主语从句（化学过程的原因，主谓结构，非系表结构）；that is causing it. 同位语从句，that = What the chemical process is 作同位语从句主语， that 可以省略

Answer 4

whatthechemicalprocessisthat'scausingit.
What the chemical process is that’s causing it.
表语从句中that做形式主语，正如你所说，是省略了一个that。

Answer 5

what the chemical process is that's causing it.
英文翻译如下

是什么化学过程导致的。
重点词汇释义
causing
使发生; 造成; 引起;
例句
The bad weather is causing problems for many farmers.
恶劣的天气给许多农民造成了困难。