▲a good / great deal (of) 大量，许多：用于修饰不可数名词。如：
We have a great deal of fun on the beach. 我们在海滩上玩得开心。
The British drink a great deal of tea.英国人饮大量的茶。
A great deal of money is spent on research. 在研究上花了很多钱。
A great deal of money has been spent on the new hospital. 这所新医院已经花费了大量金钱。
▲an amount of / a large [great] amount of 许多，大量：用于修饰不可数名词。如：
I spend an amount of time for the exam. 我花了很多时间准备考试。
Their wedding cost a fantastic amount of money. 他们的婚礼花费了很大一笔钱。
This province gets a considerable amount of rainfall. 这个省有相当大的降雨量。
用作主语，谓语的数取决于amount的数。如：
A large amount of money was spent on the bridge.
=Large amounts of money were spent on the bridge.
在这座桥上花了大量资金。
▲a number of / a great [good] number of 若干，许多：用于修饰可数名词。如：
A number of problems have arisen. 已经出现了一些问题。
He has a great number of English idioms at command. 他掌握了大量的英语成语。
其后应接复数可数名词，若用作主语，其谓语要用复数形式。
A number of problems have arisen. 已经出现了一些问题。
A large number of books have been stolen from the library. 图书馆遗失了很多书。
A number of houses were burned down in the fire. 在火灾中烧掉了不少房子。
A number of changes have taken place since the 1960s. 自从20世纪60年代以来发生了许多变化。