Another thing that i found very difficult was English grammar.一个句子不是不能出现双谓语吗,

题目

Another thing that i found very difficult was English grammar.一个句子不是不能出现双谓语吗,
这个句子怎么found 和was同时出现

答案

Another thing that i found very difficult 主语,其中that i found very difficult 为Another thing 的定语从句
was系动词 English grammar.表语
可以看出,2个谓语分别是主句及从句的,符合语法.