oh · exclamation /oʊ/
oh (NEW IDEA)
A1 introduces an idea that you have just thought of, or something that you have just remembered
Dictionary examples:
Oh, I just realized there might be a problem.
Oh, and don't forget to lock the back door.
Oh yeah, someone called and left a message for you while you were out.
Learner example:
Oh, and don't forget to show up in old clothes, ok? (Key English Test; A2; Portuguese)
oh (EXPRESS EMOTION)
A1 used to express different emotions, such as surprise, disappointment and pleasure, often as a reaction to something someone has said
Dictionary examples:
"Jack can't come after all." "Oh too bad, Amy will be sorry to hear that."
"He ran the Boston marathon last year." "Oh, really? I didn't know that!"
"I'm afraid I can't make it to the party." " Oh well, maybe next time."
Is that for me? Oh, that's so nice of you!
"I'm sorry I forgot to call." "Oh, don't worry."
Learner example:
Oh, that's ok. (Key English Test; A2; Portuguese)
Oh my gosh!
B1 used to emphasize how surprised, angry, shocked, etc. you are
Dictionary example:
Oh my gosh, I'm so happy to see you! When did you get here?