- 1has not 的縮寫
Hasn't is the short form of has not. You use it with he, she, it, or a singular name: She hasn't called. The train hasn't arrived. It means exactly the same as has not; the short form just sounds more natural in speech and in friendly writing. In careful or very formal writing, some people still prefer has not, especially when they want to press on the word not. The marks the missing o in not. You do not use hasn't with I, you, we, or they — those take haven't. Children meet it very early because we say it all day: hasn't he?, she hasn't finished, it hasn't stopped raining.
hasn't 是 has not 的縮寫，主要搭配 he、she、it 或單數名字，例如「She hasn't called.」。它和 has not 意思完全一樣，只是口語和親切的寫法比較自然，正式寫作中有人仍偏好 has not。撇號代表省略的 o。它的句型是 hasn't 加過去分詞，例如「it hasn't stopped raining」中的 stopped。主詞是 I、you、we 或 they 時，要用 haven't。
From the word’s history
has + -n't.
由 has 加上 -n't 組成。
組成From has + -n't, the short form of not.