1）修饰可数名词的 many, many a +单数名词， a great many, a good many, a large number of
例句：
Many people go in for sports.
A good many animals hibernate in winter.
Many a student likes playing basketball.
A great many of them are studying medicine.
A large number of the students are going to take part in the exam.
比较： The number of the students taking the exam is large.
