Be动词单复数only a few ,not a few ,quite a few ,mang a ,后的be动词用单数

Be动词单复数only a few ,not a few ,quite a few ,mang a ,后的be动词用单数 quite a few 和quite few Quite　a　few是什么意思? 关于quite a few few、a few、very few only a few=a few? a few of是单数还是复数 （a）few修饰或代替单数可数名词时做主语谓语动词用单数还是复数 请问(a)few,(a)little直接作主语（代词）时,谓语动词用单数还是复数? a few few的用法 quite a few students是什么意思 only few和only a few的区别