记住,从句为“（关联词）主语+谓语+其余成分”构成.意思是；括号中的关联词也许是从句的主语,也许是从句的宾语或状语.在这种情况下,就需要看从句的谓语表达理念以及关联词的原本词性来论定了,如；what brings you here is not known.(主语从句What是从句的主语）Why he has come is a mystery.（主语从句的引导词why是从句的原因状语,he是从句的主语）Do you know what he is doing.(what引出的从句承受主句的谓语行为,同时what也是从句的宾语,承受is doing 行为）
