一道高中英语语法题目请教

Question

题目： what i do believe is that the process in which we try our best.
句子错误，要把that去掉，为什么？
去掉that后整个句子结构怎么分析？
求大神~在线等

Answer 1

因为 the process 是句子的宾语，也是what 所指代的成分，that 夹在谓语 is 和宾语中多余。

结构：What I do believe 主语，is 谓语，the process 宾语，in which 连词引导的从句是宾补。

Answer 2

that多余了，已经有宾语了，这是一个名次性从句，不需要that充当先行词。
what i do believe是主语，is是谓语，the process是宾语，in which从句是修饰process的定语。
整个句子主干就是what is process.

Answer 3

what 引导的名词性从句，相当于一个名词。N + 谓语is +宾语。that引导宾语从句，此句不是宾语从句，所以不能用that