私は一時間ぐらい勉強します。

N5 私 watashi I N5 一時間 ichijikan one hour N5 ぐらい gurai about / approximately N5 勉強します benkyou shimasu study

N4 私 shi / watakushi, watashi private, I, me N5 一 ichi, itsu / hito-, hito.tsu one, one radical (no.1), un N5 時 ji / toki, -doki time, hour, temps N5 間 kan, ken / aida, ma, ai interval, space, intervalle N4 勉 ben / tsuto.meru exertion, endeavour, encourage N4 強 kyou, gou / tsuyo.i, tsuyo.maru, tsuyo.meru, shi.iru, kowa.i strong, fort, fuerte

N4 〜くらい kurai Indicates approximate degree, estimated amount, or intensity, attaches to verb, adjective, or noun, means about or to the extent that N5 〜ます masu Used at the end of verbs, polite present or future form, makes the sentence more polite N4 〜し shi Indicates multiple reasons or qualities, connects clauses or adjectives, means besides that, and also N5 〜は wa Marks the topic of the sentence, indicates what the sentence is about, can contrast with another element, organizes main information