a great many 跟a great number of可以通用
主要跟你说下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
"a great number of和a great many of的区别" 跟"a great many 跟a great many of
的区别"接近
就是说
a great number of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
都修饰可数名词,没有太大区别!