Becoming
Change-of-state frames on naru and suru: something becomes X, someone makes it X, a skill or habit gradually comes about.
-ku naru / -ni naru
polite -ku narimasu / -ni narimasubecome, get (adj, noun)
〜くなる/〜になる 〜くなります/〜になります
Marks a change of state: i-adjectives take -ku naru (samuku naru), na-adjectives and nouns take ni naru (genki ni naru, isha ni naru).
kami, mijikaku natta ne.
Your hair's gotten short!
髪、短くなったね。
kami, mijikaku narimashita ne.
Your hair's gotten short!
髪、短くなりましたね。
ii -> yoku naru: yoku natta = it got better.
-ku suru
polite -ku shimasumake it (adj)
〜くする 〜くします
Makes something X on purpose: i-adjectives take -ku suru (yasuku suru, hayaku shite), na-adjectives take ni suru (shizuka ni shite), often as a -te request.
kami, mijikaku shita.
I got my hair cut short.
髪、短くした。
kami, mijikaku shimashita.
I got my hair cut short.
髪、短くしました。
Common as a request: hayaku shite (hurry up), shizuka ni shite (keep it down). Na-adjective ni suru isn't the choosing ni suru: kirei ni suru = tidy it up, koohii ni suru = I'll have coffee.
Learn alongside: -ku naru / -ni naruLearn first: -ku naru / -ni naru, suru
-you ni naru
polite -you ni narimasucome to (be able to)
〜ようになる 〜ようになります
After a plain verb, often a potential, marks a gradual change in ability or habit (hanaseru you ni natta, hayaku okiru you ni natta).
chotto hanaseru you ni natta.
I can speak a little now.
ちょっと話せるようになった。
sukoshi hanaseru you ni narimashita.
I can speak a little now.
少し話せるようになりました。
It implies change over time; for losing an ability say -naku natta (taberarenaku natta).
Learn first: naru, -eru / -rareru