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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).
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ハロウィン  さんする こと した  
I decided to participate in Halloween.
9
さん  また          こと  した  
My mother decided to go back to college to study.
3
  ため  タバコ   わない こと  する  
I'm not going to smoke for my health's sake.
6
あの   あまり  きじゃない ので  さない こと  する  
I'm not going to talk to that person because I don't like him.
5
     その       かない こと  した  
I decided not to go watch the movie after all.
10
   すぐ   する こと  した  
The doctor decided to operate at once.
8
その        しい      こと  した  
The company has decided to employ two new secretaries.
5
       こと  した             こう  
I've decided to live with him. Let's go and get some matching tableware.

Getting the sentences
Construction
AVerb: Dictionary Form
AVerb: ない form
+こと++する
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)



User notes
6

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"
8 years ago
shirothekiller - 2195 , 168
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
8 years ago
avatar くるるぎくん - 8807 , 318
8

The tense of する is important for this grammar point.

ことにした= Recently decided
9 years ago
avatar モモ姫 - 2025 , 155
 
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!
7
       する こと  している  
I always take a bath in the morning.
8
   して    しない こと  している  
I make it a rule never to borrow money.
3
      きる こと  している  
I make it a rule to get up at six.
6
     いつも クレジット    こと  している  
I always buy expensive items on credit.
3
ジム      マイル  ジョギング  する こと  している  
Jim makes a point of jogging three miles every day.

Getting the sentences
Construction
AVerb: Dictionary Form
AVerb: ない form
+こと++して+いる
Examples:
まもることにしている (make a habit of protecting...)

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



User notes
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Discussion about this grammar
Studying : JLPT 2
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ポスト : 94, はんこ : 46
Another good way to translate this grammar construction is to say "make it a rule to ‾", as in 20するにしています。 ("I make it a rule to exercise 20 minutes every day.") .
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3
11 years ago
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Site admin
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ポスト : 10,231, はんこ : 139
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.
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0
11 years ago
guest
Looks like this example jumped to the wrong page:
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2
7 years ago
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Site admin
: 41,922, : 3,808
ポスト : 10,231, はんこ : 139
Thanks, fixed it!
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2
7 years ago
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Years studied : 1.5
Studying : N1
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ポスト : 34, はんこ : 118
Another use of ことにする is passive + ことにする meaning "to pretend to". eg. かなかったことにしてさい。
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5 years ago
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Site admin
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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.
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1
5 years ago
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Years studied : 1.5
Studying : N1
: 7,344, : 49
ポスト : 34, はんこ : 118
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: さんとしたことにする。 It's not exactly "(I) decide that (I) married Yamada" is it? Especially when you compare it with: さんとすることにする。 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
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1
5 years ago
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Site admin
: 41,922, : 3,808
ポスト : 10,231, はんこ : 139
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.
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1
5 years ago



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