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.

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!

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