彼が静かなことから何か考えていると分かった

N5 彼 kare he N5 静かな shizuka na quiet / calm N3 何か nanika something N3 考え kangae thought, idea, opinion N5 ている te iru be doing N3 分 bu dividing, part, segment

N3 彼 hi / kare, kano, ka.no he, that, the N3 静 sei, jou / shizu-, shizu.ka, shizu.maru, shizu.meru quiet, calme, quieto N5 何 ka / nani, nan, nani-, nan- what, quoi, qué N4 考 kou / kanga.eru, kanga.e consider, think over, réfléchir N3 分 bun, fun, bu / wa.keru, wa.ke, wa.kareru, wa.karu, wa.katsu part, minute of time, segment

N5 〜ている te iru Indicates ongoing action, continuous state, repeated habit, or resulting condition depending on context N5 〜から kara Indicates cause or reason, equivalent to because or since, connects two clauses explaining reason N5 〜が ga Marks the grammatical subject, highlights new information, can also show slight contrast in some sentences 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