a little可直接修饰不可数名词,而a bit则需在后面加介词of才可修饰不可数名词。a little bit与a bit用法相同,但表达意义更小,a bit little放句中表一个非常少的或非常小的。

Tom has a little money. 汤姆有一点钱。
Tom has a bit of money. 汤姆有一点钱。
I want to drink a little of that drink. 我想喝点那种饮料。
The patient's condition is getting a little better . 病人的情况好转了些。
She felt a bit/little tired. 她觉得有点儿累。
Please wait a little bit. 请稍等片刻。