oh

1. CONVENTION You use oh to introduce a response or a comment on something that has just been said. (引出答話、評語) 哦[口語]

"Had you seen the car before?"—"Oh yes, it was always in the driveway."

“你以前見過這輛車嗎？” — “哦，見過。它縂在車道上。”

2. INTERJ You use oh to express a feeling such as surprise, pain, annoyance, or happiness. (表達情緒) 哎呀[口語]

"Oh!" Kenny blinked. "Has everyone gone?"

“哎呀！”肯尼眨了眨眼，“大家都走了嗎？”

3. CONVENTION You use oh when you are hesitating while speaking, for example, because you are trying to estimate something, or because you are searching for the right word. (表示猶豫) 呃[口語]

I've been here, oh, since the end of June. 我是，呃，從6月底到這兒來的。