1. While she was hiking, she saw a bear.
彼女がハイキングをしているとき、彼女はクマを見た

2. While I was eating lunch, my friend called me.
昼食を食べているとき、私の友達が電話をしてきた

3. While they were working on their project, the boss asked about sales.
かれれがそのプロジェクトを進めていた時、上司は売り上げについて尋ねた

4. While living in Japan, one becomes accustomed to a different lifestyle.
日本に住んでいれば、違うライフスタイルに慣れるものだ