Don't be upset. I didn't mean that. 不要生氣了,我不是故意的。
I didn't mean to offend (insult, upset) you. 我沒有想冒犯(侮辱,刺激)你。
I didn't mean to do that. Let me clean it up. 我不是故意要那么做的。讓我收拾吧。
I didn't mean to say that. 我不是故意要那么說的。
You should have been here an hour ago. 你應該一個小時之前就到了。
I didn't mean to be late. 我不是故意要遲到的。