teacher says that that that that that student wrote is wrong

这是一个典型的从句套从句的复合句。主句的主谓结构是the teacher said。。。(that。。。)从句包含了宾语从句,同位语从句,和定语从句第一个that是作主句谓语动词said的宾语,引导之后的整个宾语从句,可以省略第二个that是之后的宾语从句中引导同位语从句的引导词,且不可以省略,作第三个that的同位语第三个that是一个代词,指代那个学生写的东西第四个that是定语从句的引导词,先行词是第三个that(学生写的那个东西)第五个that是形容词修饰student,意思是"那个"