Sentence examples for his one from inspiring English sources

"his one" is not a complete sentence and is not grammatically correct.
It also does not convey a clear meaning on its own. It could potentially be used as a phrase within a sentence, but it would depend on the context and intended meaning. For example: - "He showed me his one weakness" (meaning his singular weakness) - "She picked up the phone and heard his one condition" (meaning his sole condition) However, in most cases, it would be more clear and grammatically correct to rephrase the sentence to avoid using "his one" as a standalone phrase.