Question

求大神帮我分析一下这个句子，谢谢！

求大神帮我分析一下这个句子，谢谢！Although they are officially banned in sport,it is a known fact that many cyclists,basketball and football players use stimulants to make them more competitive.

Answer 1

这是一个复合从句，although引导让步状语从句，although...sport是从句，it is...competitive为住句。从句中是主系表结构（这就不说了），主句中是一个同谓语从句，it 主语，is 谓语，a known fact宾语，that many cyclists...competitive是fact的同位语，同位语从句中many cyclists，basketball and football players为主语，use为谓语，stimulants宾语，to...competitive为状语。

追问

从句主系表解释下😊

追答

although为引导词，they主语，are 系动词，officially ...banned in sport表语

追问

好的，谢谢你啦！