a little bit和a little和a bit的区别

a bit, a little
(1) a bit 和 a little 在肯定句中修饰动词、形容词、副词及其比较级，可以换用，表示“一点儿”。
The speaker spoke up a bit / a little so as to make himself heard more clearly.
演讲者把嗓音提高一点，以便使别人听得清楚。
After a day's work, I’m a bit/a little tired. 工作一天之后，我有点儿累。
(2) a bit 和 a little 在否定句中，意思正好相反。
not a bit = not at all
not a little = very much / extremely
I'm not a bit tired. = I'm not tired at all.
我一点也不累。
I'm not a little tired. = I'm very tired.
我非常累。
(3) a little 可直接作名词的定语，而 a bit 则要在后面
加 of 构成短语才能作定语，二者都只能修饰不可数名词。
There's only a little / a bit of food left for lunch.
午餐只剩一点儿食品了。
[注意] a bit of 的复数是 bits of，而a little不能变复数。
a bit, a little bit
(1) a little bit 和a bit意思一样，只不过比a bit的一点还少一点。
(2) a little bit只能作副词使用。
It's a little bit cold.今天有点冷。