N4 — outside your level filter
write + (and…) + partway through
kaite irutochuude
partway through; on the way — a stretch broken into before it reached its end
meaning: in the middle of writing
本を読んでいるとちゅうで寝てしまった。
hon o yonde irutochuude nete shimatta.
I fell asleep in the middle of reading my book. neutral
映画の途中で寝ちゃったんだよね。
eiga no tochuu de nechatta n da yo ne.
I ended up falling asleep partway through the movie. casual