彼は病気に苦しんでる

N5 彼 kare he N5 病気 byouki illness, sickness N3 苦 ku suffering, hardship, trouble

N3 彼 hi / kare, kano, ka.no he, that, the N4 病 byou, hei / ya.mu, -ya.mi, yamai ill, sick, malade N5 気 ki, ke / ki spirit, mind, air N3 苦 ku / kuru.shii, -guru.shii, kuru.shimu, kuru.shimeru, niga.i, niga.ru suffering, trial, worry

N4 〜ので node Indicates cause or reason in a softer way than kara, connects two clauses, often used in polite explanations 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 〜で de Indicates where an action happens, means used, tool, cause, or material depending on context N5 〜は wa Marks the topic of the sentence, indicates what the sentence is about, can contrast with another element, organizes main information