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Decide to A
  1. Decide to A
  2. To make a rule/habit of A
    The progressive form shows an ongoing decision/rule the subject has made (for him/herself).
ハ ロ ウ ィ ン に 参さん加かす る こと に した 。 
I decided to participate in Halloween.
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お 母 さ ん は 又 大 学 へ 勉 強 し に 行 く こと に した 。 
My mother decided to go back to college to study.
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15
健 康 の 為 、 タ バ コ を 吸 わ な い こと に する 。 
I'm not going to smoke for my health's sake.
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22
彼 の 人 は 余 り 好 き じ ゃ な い の で 話 さ な い こと に する 。 
I'm not going to talk to that person because I don't like him.
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22
結 局 、 私 は 其 の 映 画 を 見 に 行 か な い こと に した 。 
I decided not to go watch the movie after all.
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24
医 者 は 直 ぐ 手 術 為 る こと に した 。 
The doctor decided to operate at once.
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21
其 の 会 社 は 二人 の 新 し い 秘 書 を 雇 う こと に した 。 
The company has decided to employ two new secretaries.
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18
彼 と 一 緒 に 住 む 事 に 為 た の 。 御 揃 い の 食 器 を 買 い に 行 こ う 。 
I've decided to live with him. Let's go and get some matching tableware.
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其 の 工 場 は 古 い 機 械 類 を 廃 棄 為 る こと に した 。 
The factory decided to do away with the old machinery.
0

Getting the sentences
Construction
(Elements in parentheses are optional.)
AVerb: Dictionary Form
 
AVerb: ない form
 
 
ことにする
Basic Examples:
行く事に為た (I decided to go)

買わない事に為た (I decided not to buy it)

Where this grammar is found


Grammar usage notes

The tense of する is important for this grammar point.

ことにした= Recently decided
18
0
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モモ姫
Level: 1
if it helps you decide weather to use koto ni naru and koto ni suru

i use this personally
when i say koto ni naru i see it as its been decided. put in a tense where its been decided by somebody or someone but nobody seems to care the point is its been decided.

and when i say koto ni suru it focuses more on who decided it

p.s who knows if im right or not, it just seems that way to me
take my advice at your own risk lol
7
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ogawa is really close with how to tell the difference of when to use them.
ことになる- is more like something has been decided without your own input i.e. "my parents decided I should go to camp"
ことにする- is more of the persons own decision, i.e "I decided to go to camp"
19
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shirothekiller
Level: 1
(自分で) ~することに決めた
します→今、~することに決めた
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リンク・リンク
Level: 1512
機能：結果（意志）

形：V辞書・ない＋ことにした

意味：____することを自分の意志で決めた

※ 「する」と決めただけ。実際はまだしていない。
1
0
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猛眼
Level: 1645

Questions/Discussion

Nothing posted yet!
 
To make a rule/habit of A
The progressive form shows an ongoing decision/rule the subject has made (for him/herself).
  1. Decide to A
  2. To make a rule/habit of A
    The progressive form shows an ongoing decision/rule the subject has made (for him/herself).
21
私 は 毎 朝 、 入 浴 為 る こと に して居る 。 
I always take a bath in the morning.
2
24
私 は 決 し て 借 金 を 為 な い こと に して居る 。 
I make it a rule never to borrow money.
0
13
私 は ６ 時 に 起 き る こと に して居る 。 
I make it a rule to get up at six.
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19
高 価 な 物 は 何時 も ク レ ジ ッ ト で 買 う こと に して居る 。 
I always buy expensive items on credit.
0
14
ジム は 、 毎 日 ３ 哩 の ジ ョ ギ ン グ を 為 る こと に して居る 。 
Jim makes a point of jogging three miles every day.
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9
私 は 、 朝 シ ャ ワ ー を 浴 び る こと に して居る 。 
I am in the habit of taking a shower in the morning.
0
12
私 は ６ 時 に 起 床 為 る こと に して居る 。 
I make a point of getting up at six.
0
5
父 は 夕 食 前 に 入 浴 為 る こと に して居る 。 
Father makes a point of taking a hot bath before supper.
0

Getting the sentences
Construction
(Elements in parentheses are optional.)
AVerb: Dictionary Form
 
AVerb: ない form
 
 
ことにしている
Basic Examples:
守る異にして居る (make a habit of protecting...)

タバコを吸わないことにしている (making a point to not smoke)

Where this grammar is found


Grammar usage notes

(自分で決めた) 習慣などを今も続けている
1
0
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リンク・リンク
Level: 1512

Questions/Discussion

Could this be equivalent to I am used to getting up at 6 ?My understanding is that used to + present continuous implies habits.
1
0
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あおばな
Level: 255

Discussion about this grammar
This section has been archived, and no new posts can be added. Please use the discussion form(s) above.
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aileen
Level: 1
Another good way to translate this grammar construction is to say "make it a rule to ‾", as in　私は毎日20分間運動する事にしています。 ("I make it a rule to exercise 20 minutes every day.") .
3
17 years ago
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マイコー
Level: 346
Ah yes - that works well when it is in the progressive form, as you have for the example sentence. I'll add meaning in, thank you! I'll also be adding in a feature (soon, hopefully) that'll make it much easier for users to suggest new info/meanings for grammar points.
1
17 years ago
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Level:
Looks like this example jumped to the wrong page: [IMG]http://i45.tinypic.com/2lt6pf4.png[/IMG]
2
14 years ago
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マイコー
Level: 346
Thanks, fixed it!
2
14 years ago
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benjiz
Level: 6
Another use of ことにする is passive + ことにする meaning "to pretend to". eg. 聞かなかったことにして下さい。
0
12 years ago
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マイコー
Level: 346
That isn't passive :). But I do think that fits on the decide as in "Decide that you didn't listen" - or more naturally, "pretend you didn't hear it" as you said.
1
12 years ago
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benjiz
Level: 6
Yeah past tense not passive.....:P That wasn't really a good example. I think it's worth mentioning separately because I was really confused when I first saw it used that way. For example: 山田さんと結婚したことにする。 It's not exactly "(I) decide that (I) married Yamada" is it? Especially when you compare it with: 山田さんと結婚することにする。 In the first case it really means "to pretend" therefore no marriage happened/will happen, while in the latter it means "to decide". The confusion arises from the fact that in the English language "decide/make a habit of" isn't really used in such a way to convey a sense of deceit. Although you could argue that "I decide I didn't hear it" is close enough to "pretend", I've never heard anyone say "I decide I did marry Alice"wwwwwwwww
1
12 years ago
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マイコー
Level: 346
If so, it would probably best be mixed with V + ふりにする since they ...basically mean the same thing. I'll be happy to add it when I have the chance - been working on building out the new grammar quizzes, so all my time is going into that.
2
12 years ago


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