JLPT N2
ことだから
because; since (talking about someone's character) ~
Structure / Usage
Noun (person) + の + ことだから
Example Sentences
彼のことだから、きっと遅刻するだろう。
Since it's him, he'll surely be late.
真面目な田中さんのことだから、約束は守るでしょう。
Since Tanaka-san is so serious, he'll keep his promise.