JLPT N3
～最中（に）
While I was in the middle of ～; just as I was ～. Something happened (interrupted you) while you were in the middle of doing something.
Structure / Usage
V-ている最中に
Nの最中に
Example Sentences
仕事の最中に友達から電話がきました。
A call came from my friend while I was working.
メールを書いている最中にパソコンの電源が切れた。
The power on my computer went out while I was in the middle of writing an email.