只能修饰可数名词的： a large/ great/ good number of, a good/ great many, dozens of, scores of, quite a few 只能修饰不可数名词的： a great deal of, a large amount of, quite a little, a large sum of 既可修饰可数也可修饰不可数名词的： plenty of, a lot of, lots of, a large quantity of, a good supply of
