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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).
Join for free or Login to study this and other grammar in the lesson Verb Patterns: する/なる!
ハロウィン に 参さん加かす る こと に した 。 
I decided to participate in Halloween.
好
13点
お 母 さ ん は また 大 学 へ 勉 強 し に 行 く こと に した 。 
My mother decided to go back to college to study.
好
4点
健康 の ため 、 タバコ を 吸 わ な い こと に する 。 
I'm not going to smoke for my health's sake.
好
8点
あの 人 は あまり 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.
好
6点
結 局 、 私 は その 映 画 を 見 に 行 か な い こと に した 。 
I decided not to go watch the movie after all.
好
11点
医 者 は すぐ 手 術 する こと に した 。 
The doctor decided to operate at once.
好
9点
その 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.
好
6点
彼 と 一 緒 に 住 む こと に した の 。 お 揃 い 食 器 を 買 い に 行 こ う 。 
I've decided to live with him. Let's go and get some matching tableware.

Getting the sentences
Construction
(Elements in parentheses are optional.)
AVerb: Dictionary Form
 
AVerb: ない form
 
 
ことにする
Basic Examples:
いくことにした (I decided to go)

かわないことにした (I decided not to buy it)

Where this grammar is found
Genki II (2nd Edition): Chapter 23
Nihongo So-Matome N4 (日本語総まとめ): 第１週　６日目
新完全マスター文法 N3: 第１部　１１課
新完全マスター文法 N3: C 「こと・の」の使い方
新完全マスター文法 N3: G「する・なる」の整理
新完全マスター文法 N4: 第１部　２１課
JLPT N4 / Intermediate: Verb Patterns: する/なる


User notes
好
7点

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"
10 years ago
shirothekiller - Level 1
好
2点

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
10 years ago
avatar くるるぎくん - Level 1
好
9点

The tense of する is important for this grammar point.

ことにした= Recently decided
11 years ago
avatar モモ姫 - Level 1
 
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).
Join for free or Login to study this and other grammar in the lesson Verb Patterns: する/なる!
好
8点
私 は 毎 朝 、 入 浴 する こと に している 。 
I always take a bath in the morning.
好
11点
私 は 決 し て 借 金 を しない こと に している 。 
I make it a rule never to borrow money.
好
5点
私 は ６ 時 に 起 き る こと に している 。 
I make it a rule to get up at six.
好
7点
高 価 な 物 は いつも クレジット で 買 う こと に している 。 
I always buy expensive items on credit.
好
4点
ジム は 、 毎 日 ３ マイル の ジョギング を する こと に している 。 
Jim makes a point of jogging three miles every day.

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:
まもることにしている (make a habit of protecting...)

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

Where this grammar is found
Genki II (2nd Edition): Chapter 23
Nihongo So-Matome N3 (日本語総まとめ）: 第６週　２日目
Nihongo So-Matome N4 (日本語総まとめ): 第１週　６日目
新完全マスター文法 N3: 第１部　１１課
新完全マスター文法 N3: C 「こと・の」の使い方
新完全マスター文法 N3: G「する・なる」の整理
JLPT N4 / Intermediate: Verb Patterns: する/なる


User notes
No user notes have been added. Logged-in users can add user notes.

Discussion about this grammar
aileen
Studying: JLPT 2級
Level: 1, 好 : 67
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.") .
好
3点
13 years ago
avatar
マイコー
Site admin
 Level: 105, 好 : 6,427
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.
好
0点
13 years ago
guest
Looks like this example jumped to the wrong page: [IMG]http://i45.tinypic.com/2lt6pf4.png[/IMG]
好
2点
9 years ago
avatar
マイコー
Site admin
 Level: 105, 好 : 6,427
Thanks, fixed it!
好
2点
9 years ago
avatar
benjiz
Years Studied: 1.5
Studying: N1
Level: 1, 好 : 54
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。
好
0点
8 years ago
avatar
マイコー
Site admin
 Level: 105, 好 : 6,427
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.
好
1点
8 years ago
avatar
benjiz
Years Studied: 1.5
Studying: N1
Level: 1, 好 : 54
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
好
1点
8 years ago
avatar
マイコー
Site admin
 Level: 105, 好 : 6,427
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.
好
1点
8 years ago



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