英语语法问题？

Question

Still, many rightists despised Stolypin merely for his willingness to engage with the Duma, even though that was the law and the prime minister’s manipulations of the Duma were government triumphs. 这句话中even though 后的that是做从句还是主语，如果是主语从句that不能做成分，如果定语从句，非限定性不能用that，如果不是从句为什么后面还有个were，求解答

Answer 1

that是代词，指前一个句子或某个成分（和你问题关系不大，我不分析了）that是主语，后面有连接词and,是两个并列的句子，the prime minister’s manipulations of the Duma做主语，were是系动词，government triumphs和系动词一起构成谓语。