▶ just before
～の直前に
just before noon
正午の少し前
I ate breakfast just before now.
さっき朝食を食べました。
Turn right just before the elevator.
エレベーターのすぐ手前で右に曲がってください。
The darkest hour is just before the dawn.
夜明け前が一番暗い。
before とくれば after も、ということでこちらも
▶ just after
～の直後に
just after rain
雨が止んだ直後
the hours just after midnight
真夜中を過ぎたばかりの時間
Yamada came in just after Tanaka had left.
田中と入れ違いに山田が来た。
▶ LDOCE の説明も書いておきます。（No.6です）
only by a small amount, time, distance etc
just before/after/over etc
We moved here just after our son was born.
I saw her just before she died.
It's just under three centimeters long.
読んでくださってありがとうございます♪
こちらもどうぞ♪