Well…. I understand completely if reading this title gave you a migraine because it sounds like a Japanese tongue twister! But please do not despair! These grammar rules are actually not as difficult as they appear, once you understand the differences that is 😉 So, w/o further ado, I will outline these grammar points and give you some examples to help you use them in practise ❤
1) Koto ni naru & koto ni suru (ことになる+ことにする)
Both ‘Koto ni naru’ and ‘koto ni suru’ can be roughly translated as ‘to decide’. However, the difference between the two is that ‘koto ni naru’ sounds more official and less personal than ‘koto ni suru’.
Also whenever, these two grammar points are used, they must follow the plain form of the verb used in the sentence. For instance, 買いますー＞買う(koto ni naru/koto ni suru).
For example: ‘My parents have decided that I will go to Japan’=私の両親が日本に来ることになっている。Note that the present continuous form is used in this case, as the decision is still ongoing. vs/ ‘I have decided to participate’=はい、にさんかすることにしました。Do you see the difference? 🙂 The thing below will also help with what tense to use ‘koto ni naru’ & ‘koto ni suru’.
Koto ni narimasu: To hear the rumour of a decision. Koto ni narimashita: The decision has been officially announced. Koto ni natteimasu: The process/ongoing of a decision. Koto ni natteimashita: A decision that was made but has now been changed.
And let’s do the same for ‘koto ni suru’:
Koto ni shimasu: A new decision. Koto ni shimashita: Something someone decided to do. Koto ni shiteimasu: The decision someone made is still in effect.
やった！You’re halfway through so have an inspirational pic on the house, to help keep you motivated!
^ You’re mind being blown from all the powerful Japanese you’re learning!
2) You ni naru & you ni suru (ようになる+ようにする）
‘You ni naru‘ is used to describe when something or someone has changed their behaviour. I.e. Something you couldn’t do before, but can now do. For example ‘I can now speak Japanese’=私は今、日本語が話せるようになります。Same as before, I will show how tense/meaning can affect how ‘you ni naru‘ is used.
‘You ni narimashita‘: Can mean that there is a gradual change. For example, you may slowly stop coming to class. If the change is more abrupt, this is a different grammar point entirely, which I will not be delving into today!
‘You ni suru‘, roughly means ‘to try‘. For example, if I want to say ‘From tomorrow, I will try to come’=明日から、毎日来るようにします。
And there you have it! I hope this helped you improve your Japanese (if only a tiny bit) 😀 I hope to do more lessons like this in the future, as it also helps me consolidate my Japanese revision. Anyway, hoped you enjoyed learning these grammar points!