ては details

write + (and…) + if you doing that — and it will end badly

kaite wa

if you (go on) doing that — and it will end badly

meaning: if you go on writing

そんなに毎日まいにち飲んのんでは、体からだを壊こわすよ。

sonna ni mainichi nonde wa, karada o kowasu yo.

You'll ruin your health if you go on drinking like that every day. casual

家賃やちんがこんなに高たかくては、とても住すみ続つづけられない。

yachin ga konna ni takakute wa, totemo sumitsuzukerarenai.

With the rent this high, there's no way I can keep living here. neutral

て-form
i-adjective stem
na-adjective
noun
alternant
contraction
contraction

Examples

if you do that (especially repeatedly) — the condition leads to a result the speaker treats as bad

そんなに毎日まいにち飲のんでは、体からだを壊こわすよ。

sonna ni mainichi nondeha, karada o kowasu yo.

You'll ruin your health if you go on drinking like that every day. casual

家賃やちんがこんなに高たかくては、とても住すみ続つづけられない。

yachin ga konna ni takakute wa, totemo sumitsuzukerarenai.

With the rent this high, there's no way I can keep living here. neutral

素人しろうとでは話はなしにならない。もう少すこし詳くわしい人ひとに頼たのもう。

shirouto de wa hanashi ni naranai. mou sukoshi kuwashii hito ni tanomou.

An amateur simply won't cut it — let's ask someone who knows more about it. neutral

手続てつづきがこれほど煩雑はんざつでは、利用者りようしゃが離はなれてしまいます。

tetsuzuki ga kore hodo hanzatsu de wa, riyousha ga hanarete shimaimasu.

With the procedure this cumbersome, users will simply drift away. formal

Formation

{V-te}はattaches to て-form
{I-stem}くてはattaches to i-adjective stem
{NA-stem}ではattaches to na-adjective
{N}ではattaches to noun

Variant notes

ていては — the progressive shape, for a habit already under way — そんなに人ひとに頼たよっていては、いつまでも覚おぼえられない.
ちゃ — ては→ちゃ in speech — そんなに走はしっちゃ危あぶないよ.
じゃ — では→じゃ after a voiced て-form — 毎日まいにちそんなに飲のんじゃ体からだに悪わるい.

Notes

The main clause must be the bad news; a desirable result forces と or たら
instead. Repeating the frame (降ふっては止やみ、降ふっては止やみ) is a
separate iterative pattern, not this one.

Related patterns

Similar

と
と states a consequence that follows automatically and passes no judgment on it (押おすと開あく); ては presupposes the consequence is unwelcome, so it cannot host a neutral or happy result — ×毎日まいにち走はしっては健康けんこうになる, where 毎日まいにち走はしると健康けんこうになる is ordinary.
ようでは
ては takes any undesirable condition, one-off events included (バスが遅おくれては間まに合あわない); ようでは needs the clause to describe a STANDING state or habit that stands as evidence about someone, which is why its main clause is a verdict on their prospects (見込みこみはない, 先さきが思おもいやられる) rather than a plain consequence.

Lookalikes

てはいけない
てはいけない is a lexicalised prohibition — its tail is fixed and somebody is being forbidden something (ここで写真しゃしんを撮とってはいけない); bare ては is only the condition half and takes any negative verdict at all after it (困こまる, 体からだを壊こわす, 間まに合あわない) with any subject, so 雨あめが降ふっては中止ちゅうしだ forbids nobody anything.
ても
One kana apart and logically opposite — も waves the condition aside as making no difference (雨あめが降ふっても決行けっこうする), は makes it the decisive cause of a bad result (雨あめが降ふっては中止ちゅうしだ); read ては as ても and the sentence's verdict reverses.

Same meaning

if you go on like that; and it will end badly

Pattern	Attaches to
ようでは