I think that that that that man wrote was wrong.

有病,这样的句子研究它干吗?

疯子,知道用法不就行了,谁生活中会用到?

我认为那个男人写的是错的.
第一个that引导宾语从句.
第二个that在宾语从句中充当主语.
第三个that引导第二个that的定语从句.
第四个that是修饰man的,那个.

你的题目一定抄错了。应该是
I think that what that man wrote was wrong.
第一个that 是 i think that 其中that 可以省略。that 引导是宾语从句。
第二个that 是“那个“的意思。
what that man wrote 那个男人所写的东西。

我认为那个人写的是错误的。

I think that （以下宾语从句）that （这个that是代词，指代那个人写的东西，同时作为后面定语从句的先行词）that （以下是定语从句，这个that是定语从句的引导词）that man wrote （定语从句结束）was wrong.

我认为那个人写的that是错误的