授業（じゅぎょう）が終（お）わるとすぐに彼（かれ）らは教室（きょうしつ）から走り出（はしりだ）た。

As soon as the lesson was over, they rushed out of the room.

彼女（かのじょ）がドアを開（あ）けるやいなや猫（ねこ）が走り出（はしりだ）た。

No sooner had she opened the door than a cat ran out.