关于英语分词做后置定语和betodo结构的疑问Tobeginwith,thepurposeofthedrawingsistoshowusthattheflowergrowinginthegreenhousecannotwithstandthetestofthestorm,yetthesymbolicmeaningssubtlyconveyedshouldbe

　　关于英语分词做后置定语和betodo结构的疑问

　　Tobeginwith,thepurposeofthedrawingsistoshowusthattheflowergrowinginthegreenhousecannotwithstandthetestofthestorm,yetthesymbolicmeaningssubtlyconveyedshouldbetakenmoreseriously

　　1,thesymbolicmeaningssubtlyconveyedshouldbetakenmoreseriously

　　这句conveyed的用法对吗?我觉得应该少一个起主语作用的词吧代语或者其它什么

　　2,thepurposeofthedrawingsistoshowusthat...

　　这里面betodo是一种什么结构吗?