英语高手帮个忙我在书上看到一句话many people chose to further sutdy which the

主语：many people
谓语：chose （choose to do)
不定式做chose的宾语：to study
关系代词：which 引导“which they hope.springboard"定语从句 指代“many...study"这件事
不定式做目的状语 :to get (a good job 做此不定式的宾语）
定语从句：which they hope can be used as a springboard
关系代词：which 同时充当从句主语
插入语 ：they hope
谓语：can be used as (被用来作为.) （a springboard 做as 的宾语）
*或者整句话可以理解为 they hope that ("the further study" which they chose to do )can be used as a springboard to get a good job.

把定语从句“which they hope can be used as a springboard to get a good job”还原，得：
They hope further study can be used as a springboard to get a good job.
从这里可以看出，can be used与hope并不在同一个语法层面上，they hope...

中间省略了they hope (that the study) can be used

很多人都选择了继续学习, 他们希望这种学习可以被用来作为找到一个好工作的跳板。

这里they hope 应该能看做插入语，used肯定不是形容词，这里是被动用法。插入语可以去掉，不影响整个

which引导定语从句

be是因为can是情态动词，要加上原型，之所以你觉得糊涂是hope动词要加上to do 是吧，但是这后面是从句，省略了that 而已。many people chose to further study which they hope that can be used as a springboard to get a good job 这么你就能明白了，是从句套从句的结构，只有一个动词。希望能帮...

used是形容词，形容词前加be动词，也可以看作use的过去分词，被动用法，前加be动词。
hope+从句，所以hope后面是一个句子，不受hope影响。