题目内容：

The play (is adapt from) a ture story is very popular with young people.为什么错了?答
The play (.is adapted from.)a ture story is very popular with young people.为什么错了?.(that/which is) dadpted from.这是个什么结构?为什么要用这个结构?

优质解答

【主语The play】 【定语从句which is adapted from a ture story】【系词is 】very 【表语popular】 with young people.
因为一个句子中不能有两个谓语
which/that~引导play的定语从句,在从句部分中作主语.

追问：

为什么that = which is?

追答：

不是that=which is 哦 是that is 或者which is