They also said her work was equal to that of a student who had completed four years of college.
请问that of a student 是什么用法啊

They also said her work was equal to that of a student who had completed four years of college.
请问that of a student 是什么用法啊

that =work here 这种例子很多的，是为了避免重复，They also said her work was equal to work of a student who had completed four years of college.

1.这是形容词、副词比较级中同级比较的一种形式，少见一些。用 to 可代替as或than,特别是在equal, similar, equivalent, proportional, comparable 等形容词后。例子：
this is similar to that.
2.在比较时，只有同类才能比较，避免重复，一般用that 代表单数，用those 代表复数。
Most of the highways in America are wider than Europe.*为错句
Most of the highways in America are wider than those in Europe.(those代替highways)
The population of China is much larger than that of the U.S.A.and Japan put together.(that 代替population)
3.综上所述，They also said her work was equal to that of a student who had completed four years of college.这个句子中that 代替work.

They also said her work was equal to that of a student who had completed four years of college.
请问that of a student 是什么用法啊


这个that of 中的that 是指代前面的work，整个that of 在句子当中是作被修饰成分，而后面的定语从句a student who had completed four years of college是修饰这个that ,也就是修饰work。
证据的意思是，他们说她的工作和一个大学本科毕业学生的工作相当（意指她比较能干）。

回三楼：
1.who had completed four years of college是个定语从句修饰a student. 但不修饰that.
2.that of a student是一个所有格形式。一般没有解释成修饰的关系，因为那样说意思不清。