ては〜ては details
Examples
does X and then Y, again and again — a two-step cycle, often a futile or wearying one
原稿を書いては消し、書いては消して、とうとう朝になった。
genkou o kaite wa keshi, kaite wa keshite, toutou asa ni natta.
I wrote and deleted, wrote and deleted, and in the end it was morning. neutral
あの子、おもちゃを買っては飽き、買っては飽きての繰り返しなんだよ。
ano ko, omocha o katte wa aki, katte wa akite no kurikaeshi na n da yo.
That kid buys a toy, gets bored with it, buys another, gets bored — it's the same thing over and over. casual
試作品は、作っては壊し、作っては壊しを繰り返してまいりました。
shisakuhin wa, tsukutte wa kowashi, tsukutte wa kowashi o kurikaeshite mairimashita.
With the prototypes, we built and scrapped, built and scrapped, again and again. formal
Formation
V1てはV2、V1てはV2(文中のV2は連用形:書いては消し)attaches to noun phrase (schematic)
Notes
pair can loop, and only the last predicate carries tense. Order is fixed:
波が寄せては返す is the wave rolling in then back out.
Related patterns
Similar
たり〜たり samples an unordered set, so swapping its two conjuncts changes nothing; ては〜ては fixes the order of exactly two actions into a loop — 書いては消し and 消しては書き describe different scenes.
Lookalikes
Same ては, but てはいけない is lexicalised prohibition whose は is always followed by a negative-evaluation predicate; in ては〜ては the ては is a bare repetition joint carrying no evaluation at all, so meeting 〜ては mid-sentence tells you nothing about whether a ban follows.
Same meaning
over and over — the same two steps looping
no other patterns in this meaning class yet