The study suggests that if these girls grow up believing tha

The study suggests that if these girls grow up believing that boys are better at math than girls are,then these girls may not do as well as they would have if they were more confident。研究显示如果女孩怀着着男孩比她们更擅长数学的想法长大,那么她们就不会比在更自信的情况下做得好。（意思是,如果她们更自信的话,本可以做得更好些。）The study 主语suggestes 谓语that 及其后为宾语从句“if。are“是从句的第一个条件状语从句。其中these girls 从句主语,grow up 从句谓语,"believing that。are"为伴随状语then。。。have为从句的主干部分,if they were more confident 为宾语从句的第二个条件状语从句。哥们,给你私信了`以前帮你回答的一个问题,麻烦解决下~