ADJ + KU/NI NARU (なる)
The structure “KU NARU (くなる) or NI NARU (になる)” is used after an adjective to indicate an evolution, a change. なる means “to become.” What precedes these two forms is, therefore, the result of the change.
For adjectives in い, we replace い with -くなる. The adjective いい (well, good) is an exception, and becomes YOKU NARU (良くなる).
|Tomiko wa ookiku natta ne!|
|Tomiko has grown!|
|Kanojo wa sugu yoku naru darou.|
|She should feel better soon.|
Since なる is a verb, it can be conjugated in many different ways to modulate the meaning of the sentence.
The main verb in the structure can also be conjugated (negative form in -ない, or the form -たい used to translate “I want,” etc.). As with adjectives in い, the final い is replaced by く.
|Saikin, chokoreeto ga tabetakunaru koto ga aru.|
|I’ve been feeling like eating chocolate, these days.|
|Suugaku wa, benkyou sureba suru hodo wakaranakunaru.|
|The more I study math, and the less I understand it.|
For adjectives in NA (な) and nouns, we use になる.
|Firippu wa eigo ga jouzu ni natta.|
|Philip has become good at English.|
|Niku o tabesugiru to, byouki ni naru yo.|
|If we eat too much meat, we get sick.|
|Ani wa bengoshi ni naru tame ni houritsu o benkyou shite iru.|
|My older brother is studying law to become a lawyer.|
There is also the structure “verb in -TE form + KARA + length of time + NI NARU” that helps convey the idea of “It has been + length of time + since…”
|Ane ga kekkon shite kara go kagetsu ni narimasu.|
|It has been 5 months since my older sister got married.|
|Toukyou ni hikkoshite kara mou ni nen ni naru.|
|I’ve been living in Tokyo for two years now.|