忙しいからといって勉強しないわけにはいかないと思う

N5 忙しい isogashii busy N5 勉強 benkyou study, learning N5 ない nai there isn't, doesn't have N5 はい hai yes N4 思う omou think, feel, suppose

N3 忙 bou, mou / isoga.shii, sewa.shii, oso.reru, ureerusama busy, occupied, restless 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 思 shi / omo.u, omoera.ku, obo.su think, penser, pensar

N5 〜と思う to omou Indicates speaker thought opinion or assumption, connects clause with mental expression N5 〜から kara Indicates cause or reason, equivalent to because or since, connects two clauses explaining reason N4 〜し shi Indicates multiple reasons or qualities, connects clauses or adjectives, means besides that, and also N5 〜に ni Indicates destination, target, arrival point, specific time, or person receiving an action N5 〜と to Indicates company, quotation, natural condition, complete list, or direct connection between elements N5 〜か ka Marks a question, alternative, or uncertainty, appears at the sentence end or between options N5 〜は wa Marks the topic of the sentence, indicates what the sentence is about, can contrast with another element, organizes main information