A：a bit 和 a little 的意思幾乎相同，但兩者前面若加上 “not”，意思卻完全不同。not a bit 意為「一點也沒有；一點也不」，而 not a little 意為「很多；非常」。例如：
- Tom wasn’t a bit surprised. (湯姆一點也不驚訝)
- Tom wasn’t a little surprised. (湯姆非常驚訝)
a bit 和 a little (兩者皆當副詞用時) 在修飾動詞、形容詞時可以互換，如 The shirt looks a bit/a little large. (這件襯衫看起來有點大或看起來大了一點)；但 a bit (不可當形容詞用) 後面不能直接接名詞，若要接名詞，須使用 a bit of，如 Give me a bit of water. (請給我一點水)，而 a little (可當形容詞用) 後面可直接接名詞，如 There is a little food in the bowl. (碗裡有點食物)。
關於 not a little，也可使用 no little 或 quite a little 來表達相同的意思，這三個片語都與 much 同義，亦即 “not a little = no little = quite a little = much” (很多) — 它們都是接不可數名詞。若要接可數名詞，英文也有相對應的片語來表達相同的意思，它們是 “not a few = no few = quite a few = many” (很多)。例如：
He has much money but I have many books. (他有很多錢，但我有很多書)
= He has not a little money, but I have not a few books.
= He has no little money; I have no few books.
= He has quite a little money; I have quite a few books.
= He has a great deal of money but I have a large number of books.