问
（1）A great many of men were killed. A B C D (2) He seems to have a great deal money. 试题(1)要求将 A great many of 改为 A great many, 而试题(2)却要求将 a great deal 改为 a great deal of。这到底是为什么呢?
答
要记住，a great many 既可以直接放在名词之前(注意:此时 many 是个形容词)，也可以借助于介词 of 放在名词之前(注意:此时 many 为代词)。但是,两者的用法不同。在上题中，由于 men 是个无定指的名词(不带限定词)，所以不能跟 A great many of 连用，而必须改为 A great many。与此相反，a great(good) deal 是个名词性短语，它必须通过介词 of 才能与不可数名词连用，故试题中的选项 a great deal 必须改为 a great deal of。参见 deal²，many³。