few和a few有什么区别?用法有什么不同?请详细地写出.

few和a few有什么区别?用法有什么不同?请详细地写出. quite a few 和a few有什么区别? a few 和a few of有什么区别? a few of和a few有什么区别呢? 英语-a few ,few,a little,little有什么区别? 英语单词:"a little" "a few" "few" "little"有什么区别 a few,a few of,a lot和a lot of有什么区别? less than和fewer than,little和a little,few,a few分别有什么区别? a litte和little/a few和few有什么区别? a few days later 和 a few days ago 有什么区别? 请问：in a few years' time和in a few years有什么区别 请问：in a few years' time和in a few year's有什么区别