What it means
ながら means “while doing” and links two actions that happen at the same time. The action before ながら is usually a verb in its masu-stem form, and the action in the main clause is the main focus. The subject of both actions is normally the same. The register of the sentence is determined by the main verb, so ながら itself does not change between familiar and polite sentences.
Usage note
ながら is mainly used for simultaneous actions with the same subject. Do not confuse it with the different use of ながら meaning “although,” which is usually taught separately.
How to use it
毎朝、音楽を聞きながら、朝ご飯を食べます。
Every morning, I eat breakfast while listening to music.
毎朝、音楽を聞きながら、朝ご飯を食べる。
Every morning, I eat breakfast while listening to music.
Example sentences
音楽を聞きながら、宿題をします。
I do my homework while listening to music.
母は料理をしながら、テレビを見ます。
My mother watches television while cooking.
毎朝、コーヒーを飲みながら新聞を読みます。
Every morning, I read the newspaper while drinking coffee.
妹は歌いながら、部屋を掃除します。
My younger sister cleans the room while singing.