write + while doing
kaki nagara
while doing; at the same time as
meaning: while writing
歩きながらスマホを見るのは危ないよ。
aruki nagara sumaho o miru no wa abunai yo.
Looking at your phone while walking is dangerous. casual
音楽を聞きながら宿題をした。
ongaku o kiki nagara shukudai o shita.
I did my homework while listening to music. neutral