❶理由, わけ
for this reason
for this reason
こういう理由で
I want to know the reason for his absence.
I want to know the reason for his absence.
私は彼の欠席の理由が知りたい.
What is the reason for his absence? (=Why is he absent?)
What is the reason for his absence? Why is he absent?
彼の欠席の理由は何ですか.
There is no reason to doubt his word.
There is no reason to doubt his word.
彼の言葉を疑う理由は何もない.
⦣ to doubt （疑う～）は reason を修飾しゅうしょくする不定詞. to❾の②
She had a bad cold. That is the reason (why) she was absent from school yesterday.
She had a bad cold. That is the reason (why) she was absent from school yesterday.
彼女はひどい風邪かぜをひきました. それが彼女が昨日学校を休んだ理由です.
✓POINT
上の例の why は reason にかかる関係副詞で, しばしば省略される. the reason のほうを省略して That is why she was ～. としてもよい.
