a few 和a few of的区别是什么 都怎么用,请举例说明

a few 和a few of的区别是什么 都怎么用,请举例说明 a few 和 a couple of 的区别是什么? a few 和a few of有什么区别? a few of和a few有什么区别呢? a few of与a few的区别? a few ,a little ,few,little的区别是什么? little,a little,a few,few的区别是什么? a few和few.//a little和little的区别 a litter和litter a few和few的区别 a few of和many of的区别 little,few,a little和a few的区别 a few minutes和a few mintutes' 的区别