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N2
〜ことだから
Meaning
Expresses an inference that things will naturally be so, based on the character or usual behavior of someone one knows well. As in 「いつもの彼のことだから」, it states a judgment grounded in that person's nature.
Examples
- 几帳面な彼のことだから、約束の時間には必ず来るだろう Knowing how meticulous he is, he'll surely arrive on time.
- あの子のことだから、もう宿題は終わらせているはずだ Knowing that child, they've surely already finished their homework.
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