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.

　　2)修饰不可数名词的 much, a great deal of, a large amount of

　　例句：

　　We learned a great deal from them.

　　They have much homework to do.

　　A large amount of time was wasted in saving the child.

　　Small amounts of money was stolen from time to time.

　　3)既可以修饰可数名词，又可以修饰不可数名词的 a lot of ,plenty of, quantities of 等

　　例句：

　　We have plenty of rain this year.

　　They need plenty of desks and chairs.

　　A quantity of books has been sold to the people there.

　　Quantities of money have been spent building the grand theater.

　　练习：