as soon as 的中文意思是指「一…就」的意思，soon 是指「不久、很快」的意思，而當soon跟as 組合成 as soon as 的結構，就變成了「一…就」的意思。
下面列舉出as soon as 的英文用法跟中文意思，趕快學起來吧！
1. as soon as 一…就
as soon as 的中文意思是指「一…就」。
He left as soon as he saw her.
As soon as I saw her, I knew there was something wrong.
2.為什麼 as soon as ～ 是「剛……就～」？
《最強圖解英文文法》的作者在書中有解釋，為什麼 as soon as 是「剛….就….」的意思。首先要準備2 句英文。
• It began to rain soon.「不久就開始下雨了。」
• He went out soon.「不久他就出門了。」
這2句要以 as…as 聯繫，造出 as…as ∼ 的句型。
It began to rain as soon as he went out soon.
It began to rain as soon as he went out.
換句話說，as soon as… 是「跟……同樣不久」→「與此同時」。
另外，如果將 as soon as 當作一個連接詞來用，也可以造出以下句子：
例：As soon as he went out, it began to rain.
3. as soon as possible 盡快
as soon as possible 則是另一個很常見的英文用法，意思是「盡快地、越快越好」。
例：Please reply as soon as possible.
例：Please make your decision as soon as possible.