第二次世界大戦は1939年に始まった

N5 二 ni two, number two N5 次 tsugi next, following N4 世界 sekai world N3 大戦 taisen great war, major battle N5 年 toshi year, age

N1 第 dai, tei No., residence, numéro N5 二 ni, ji / futa, futa.tsu, futatabi two, two radical (no. 7), deux N3 次 ji, shi / tsu.gu, tsugi next, order, sequence N4 世 sei, se, sou / yo generation, world, society N4 界 kai world, boundary, monde N5 大 dai, tai / oo-, oo.kii, -oo.ini large, big, grand N3 戦 sen / ikusa, tataka.u, onono.ku, soyo.gu, wanana.ku war, battle, match N5 年 nen / toshi year, counter for years, année N4 始 shi / haji.meru, -haji.meru, haji.maru commence, begin, commencer

N5 〜に ni Indicates destination, target, arrival point, specific time, or person receiving an action N5 〜は wa Marks the topic of the sentence, indicates what the sentence is about, can contrast with another element, organizes main information