many， a good / great many， a (great / large) number of， scores of， dozens of，a lot of， lots of， plenty of注意 many a(n) 修饰的是可数名词 但后面接可数名词单数形式 表示复数概念
扩展修饰复数名词的:some.any.a lot of.lots of.many.few.a few.several，a number of
修饰不可数名词的:much，some，any，a lot of.lots of.little，a little
