On purpose 表示有意、不是偶然，说明某人是有意识地做某事。道歉时常听到 I didn't do it on purpose，意思是“我不是故意的”。
想在对话中用 on purpose 吗？
写一句英语，查看错误和更自然的表达建议。
本次检查比平时稍久，完成后反馈会自动显示在这里。
do + something + on purpose; didn't + verb + on purpose; by accident (opposite)
- She arrived early on purpose to get a seat near the front.
- The designers made the buttons large on purpose, so older users can tap them easily.
- Our teacher sometimes makes small mistakes on the board on purpose to check if we're listening.
修改原因
修改前I'm sorry, I didn't break your mug by purpose.
修改后I'm sorry, I didn't break your mug on purpose.
容易受到反义表达 by accident 的影响而用错介词。这两个表达的结构不同：偶然用 by accident，故意用 on purpose。原句只需把 by 换成 on。
Deliberately 意思相近，但语气更郑重，较常用于新闻和正式文字：The fire was started deliberately。On purpose 更口语化，通常放在句末：She did it on purpose。
动手练习
He knew the meeting started at ten, but he arrived twenty minutes late ___ because he wanted to skip the long introduction.
查看答案
on purpose — 他知道会议十点开始，却想避开冗长的开场，因此是故意迟到，应选 on purpose。By accident 表示偶然，与 because he wanted 所说明的意图相矛盾。
回想一件你有意做的事，但周围人以为只是偶然。说明做了什么，以及为什么这样做。
My friends thought I had forgotten my phone, but I left it at home on purpose because I wanted a quiet weekend.
练习把新词用准确
用正在学的词造句。LetsWords 检查用法和语法，提供修改与母语解释，再通过复习巩固。