be based on是被动语态还是主系表结构
问题描述：
be based on是被动语态还是主系表结构
例如
His failure in the test is based on the fact.
为什么
答
被动语态!base(及物动词)base on,base upon把…的基础放在…上,以(…)作为…的根据.因为有主动语态的用法：base one's hopes on … 把希望寄托在…上.（直译：把希望的基础放在...上）反过来是...is based on one's ...