求a bit ,a few,a little（of）的区别?

a few,a little,a bit的用法：
a few译作“几个”,a little,a bit译作“有点儿”.它们具有名词、形容词或副词的特点,在句中可充当主语、宾语、定语或状语.
1.名词性词组：a few代替复数名词,a little,a bit代替不可数名词.如 My answers are wrong.Tell me a few./ There is no milk in my glass,give me a little (= a bit),please.
2.形容词性词组：a few修饰复数名词,a little修饰不可数名词,a bit加上of后修饰不可数名词.如 a few dictionaries / a little water (= a bit of water)
3.副词性词组：a little,a bit可修饰形容词、副词的原级或比较级.a few不可.如 I’m a little (= a bit) cold./ He is a little (= a bit) taller than Tom.
注：(1) a bit还可写成a little bit,a bit of还可写成a little bit of
(2) few,little前不加a时：
a.通常表示否定含义,译作“几乎没有”.如 He made few mistakes.(注：few后仍接复数名词) / There is little coffee here,is there?
b.在有些词组中,few前也不加a,却不表示否定含义.如 every few weeks (“每隔几周”),another few books (“另几本书”)
(3)当few,little,bit前有quite,just,only时,必须加a.quite a few译作“许多的”,等于many,quite a little / bit也译作“许多的”,等于much.just a few / little / bit译作“就一点儿”,only a few / little / bit译作“仅仅一点儿”.
(4)当few,little,bit后有more时,必须加a.a few more译作“另/再几个”,a little / bit more译作“另/再一点儿”.如 I want a few more bananas./ Give me a little more fruit.
(5)否定时,not a little译作“很、非常”(即“不是一点点”),相当于very或very much； not a bit译作“一点儿也不”,相当于not at all.如 She isn’t a little angry.(“她很生气”) / She isn’t a bit angry.(“她一点儿也不生气”)
(6) few还有“少的”意思.如 This school has fewer classes.
little还有“小的”意思.如 She’s a little girl.那么a few后加上的名词要是复数名词吗？后面有要用be动词的话是用are吗？a few 永远是复数概念，后面的名词用复数，后面的be动词用are别忘了采纳我哦！