plenty of ，a lot of ，lots of ，a quantity of ，quantities of，a supply of ,supplies of, a mass of, masses of可与可数名词和不可数名词连用a number of ，a variety of , varieties of, a good/great many 后接可数名词复数a good/great many of 后面的名词复数前要有the/these/those/one'sa great amount of， amounts of ，a great/good deal of 后接不可数名词 a sum of 修饰货币