(A great many)people called to ask about her health这里为什么要填A great many(A great many) people called to ask about her health这里为什么要填A great manyA great many不是后面接可数名词吗?这题为什么不能填A great many of呢还有一个问题How is this book different (from) that?这里为什么要填from不能用of呢?

一、a great many后直接修饰名词, 名词可以有修饰语, 如:
a great many students
a great many young students
二、a great many of后主要接：
1. 代词：a great many of them
2. 受冠词修饰的名词：a great many of the students
3. 受these, those修饰的名词：a great many of these students
4. 受物主代词修饰的名词：a great many of my students
5. 受所有格修饰的名词：a great many of Tom's students
different from是固定的词组 意识是与..不同 所以不能用of了

a great many 跟a great many of 的区别
a great many后面直接加复数可数名词
a great many of 后面跟限定语再跟名词
例如:
a great many students
a great many of "my" classmates
be different from 是一个固定词组,与..不同