While ながら

While doing this I also did this...

Construction:　
arrow Take the ます form of a verb and drop the ます (the stem)
arrow Add ながら

音楽を聴きながら勉強をしました。
ongaku o kiki nagara benkyou o shimashita.
While studying, I listened to music.

本を読みながらご飯を食べます。
hon o yomi nagara gohan o tabemasu.
While eating a meal, I read a book.

One useful set phrase is 残念ながら zan nen nagara and means, "That's too bad" or "I regreat (to say)" or "Unfortunately"
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