用法：
1、a bit of 修饰名词，通常用于修饰不可数名词。
午饭只能吃剩下的一点食品了。
2、a bit of的另一种形式是bits of
Besides this,he used part of an old army wireless set,and some bits of wood.
除此之外,他还利用了一部分旧的军用无线电发报机的一部分零件和一些木片。
3、a bit (of)有点；稍微
I'm a little bit tired.Let's take a short rest.
我有点累了。让我们休息一会儿。
I'm a bit tired tonight.
今晚我有点疲倦。
The painting on the wall is a bit crooked.
墙上的油画有些歪。
Don't believe all he says — he's a bit of a boaster.
别全信他说的,他有点自吹自擂。
We were very sorry to see that the houses of some school teachers were a bit of a hole.
看到有些小学教师的住房小得象个窝,我们很难过。
4、a bit (of) 一点儿也（不）
I'm not a bit tired now.
我现在一点儿也不累。
Really,David is not a bit like his brother as far as generosity is concerned.
的确,就慷慨大方这一点来说,大卫确实一点也不像他哥哥。
5、a little = a bit of, 后接不可数名词； a little = a bit = a little bit = kind of, 后接形容词，意为“有点儿”。