immersionlog

Purpose and cause: ために, ように, せいで, おかげで

'In order to' and 'so that', 'because of' and 'thanks to'. Four patterns that look alike and that choose between deliberate action and natural outcome, good and bad results.

About 5 minutes to read

Some patterns say why you do something, and some say why something happened. This lesson separates purpose from cause.

ために: for the purpose of

Dictionary form + ために or Noun + の + ために = "in order to / for the sake of".

日本語にほんごJapaneseを 勉強べんきょうするstudyためにin order to日本にほんJapanに 来きたcame
I came to Japan in order to study Japanese.
家族かぞくfamilyのためにfor the sake of働はたらくwork
I work for my family.

Rules for the purpose use of ために:

  • The same person does both parts (I study; I came).
  • The first verb is a deliberate action you can choose to do.

ように: so that (a state)

ように shows a purpose that is a state or result, not a deliberate act. It's used with potential verbs, negatives, and things that happen on their own.

忘わすれないforget notようにso thatメモnoteを 取とるtake
I take notes so that I won't forget.
よくwell見みえるcan seeようにso that前まえfrontに 座すわったsat
I sat in front so I could see well.
風邪かぜcoldを 引ひかないcatch notようにso that気きをつけてbe carefulください 
Be careful not to catch a cold.

ために vs ように — ask: is the first part something you choose to do?

ためにように
勉強するために来た✓ you choose to study
分かるように説明する✓ understanding is a result
風邪を引かないように✓ negative: not an act
日本語が話せるように✓ potential: a state

のに: the tool for the job

Dictionary form + のに (with no contrast) says what something is used for.

この ナイフ は パンbreadを 切きるcutのにfor使つかうuse
I use this knife for cutting bread.
東京とうきょうTokyoに 行いくgoのに(for the purpose)三時間さんじかんthree hoursかかるtake
It takes three hours to get to Tokyo.

This のに is not the "although" のに from before. Context settles it: after a verb of using or taking time, it's a purpose.

せいで and おかげで: cause with a judgement

Both mean "because of", but one blames and the other thanks.

せいで (せい: "fault") — bad outcome:

雨あめrainのせいでbecause of試合しあいmatchが 中止ちゅうしcancelledに なったbecame
The match was cancelled because of the rain.
寝坊ねぼうoversleepingした せいでbecause遅刻ちこくlatenessした 
I was late because I overslept.

おかげで (おかげ: "shade, benefit") — good outcome:

先生せんせいteacherのおかげでthanks to合格ごうかくpassできたwere able
Thanks to my teacher, I passed.
友達ともだちfriendが 手伝てつだってhelpedくれた おかげでthanks to早はやくearly終おわったfinished
Thanks to my friend helping, it was done early.

Before a noun you add の; before a verb or adjective, use the plain form (nouns and な-adjectives take な or の).

による and によって: caused by

In writing, によって / による marks cause, means and the agent in a passive:

事故じこaccidentによってdue to電車でんしゃtrainが 遅おくれたwas delayed
The train was delayed because of an accident.
事故じこaccidentによるdue to遅おくれdelay
a delay caused by an accident

ばかりに: because of just that

ばかりに is a strong "all because of" — usually regretful:

一言ひとことone word言いったsaidばかりにjust because嫌きらわれたwas disliked
I was disliked just because of one remark.

Longer sentences

Purpose and cause often appear together in one explanation.

新あたらしいnew仕事しごとにjob早はやくearly慣なれるためにin order to get used毎日まいにちevery day帰かえってからafter coming home復習ふくしゅうをしていますがI'm reviewing, but忘わすれないようにso as not to forgetノートにもin a notebook too書かいていますI'm writing
In order to get used to my new job quickly, I review every day after I get home, and I also write things down in a notebook so I won't forget.
台風たいふうのtyphoon'sせいでbecause of飛行機ひこうきがflights全部ぜんぶall欠航けっこうになりcancelled and予定よていしていたplanned旅行りょこうはtrip中止ちゅうしせざるを得えなかったがhad no choice but to cancel, butホテルのhotel'sおかげでthanks to無料むりょうでfreeキャンセルできたcould cancel
Because of the typhoon all flights were cancelled and we had no choice but to call off the trip we'd planned, but thanks to the hotel we could cancel for free.

A study plan

来年らいねんのnext year's試験しけんにexam合格ごうかくするためにin order to pass私わたしはI朝あさとmorning and夜よるのnight's二回にかいにtwice分わけてdividing勉強べんきょうすることにしたdecided to study
朝あさはin the morning頭あたまがheadすっきりしているのでsince it's clear新あたらしいnew内容ないようをcontent覚おぼえるmemoriseのにfor使つかいuse and夜よるはat night忘わすれないようにso as not to forget復習ふくしゅうにreview当あてるdevote
In order to pass next year's exam, I decided to study in two sessions, morning and night. In the morning my head is clear, so I use that time for memorising new material, and in the evening I devote the time to review so I won't forget.

Key points

  • ために: deliberate purpose. ように: purpose that is a state or outcome.
  • のに after a verb of using or taking time: "for (doing)".
  • せいで: bad cause. おかげで: good cause.
  • によって / による: formal cause or agent.

Drill these patterns

Short example sentences for the points in this lesson: