日本に来て三か月になります。

N3 日本 nippon Japan N3 来 rai next, coming, prefix for time N5 三 san three N4 月 tsuki moon, month

N5 日 nichi, jitsu / hi, -bi, -ka day, sun, Japan N5 本 hon / moto book, present, main N5 来 rai, tai / ku.ru, kita.ru, kita.su, ki.tasu, ki.taru, ki, ko come, due, next N5 三 san, zou / mi, mi.tsu, mitsu.tsu three, trois, tres N5 月 getsu, gatsu / tsuki month, moon, lune

N5 〜ます masu Used at the end of verbs, polite present or future form, makes the sentence more polite N5 〜に ni Indicates destination, target, arrival point, specific time, or person receiving an action N5 〜か ka Marks a question, alternative, or uncertainty, appears at the sentence end or between options