1
be engaged in sth / doing sth
表示忙于或从事某项活动。
She is engaged in a new project.
她正在忙于一个新项目。
已订婚的；有婚约的
先理解核心含义，再看它在真实句子里的用法。
已订婚的；有婚约的
having agreed to marry a particular person
She is engaged in a new project.
她正在忙于一个新项目。
已同意与某人订婚
Having agreed to marry a particular person (one's fiancé or fiancée) or each other.
忙碌或被雇用
Busy or employed.
非常感兴趣
Greatly interested.
附着于墙上或嵌入墙中一半
attached to a wall or sunk into it halfway
She was deeply engaged in conversation with her friend.
她正全神贯注地与朋友交谈。
All the tables in the restaurant are engaged for the evening.
餐厅所有桌子今晚都已预订。
I tried to call the office, but the line was engaged.
我试图给办公室打电话，但线路占线。
表示忙于或从事某项活动。
She is engaged in a new project.
她正在忙于一个新项目。
表示已订婚。
He is engaged to my cousin.
他和我表妹订婚了。
用于电话或设施被占用。
The line is engaged. Please call back later.
电话占线，请稍后再打。
Not this
He engaged in the project.
Use this
He is engaged in the project.
形容词 engaged 表示“忙碌的”时需与 be 动词连用，构成 be engaged in 结构；而 engage 作为动词时意为“吸引、从事”，但此处需用形容词状态。
Not this
She is engaged with a lawyer.
Use this
She is engaged to a lawyer.
表示“与某人订婚”时，固定搭配为 be engaged to sb，介词用 to 而非 with。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
订婚
They got engaged last spring.
他们去年春天订婚了。
与某人订婚
She is engaged to a doctor.
她与一位医生订婚了。
从事某事；忙于某事
He is engaged in research on climate change.
他从事气候变化研究。
深度投入的；非常感兴趣的
The children were deeply engaged in the art project.
孩子们深深投入于这个艺术项目。
让某人保持兴趣/参与
Good teachers know how to keep students engaged.
好老师懂得如何让学生保持参与。
保持参与
It is important to remain engaged in local politics.
保持参与地方政治很重要。
从事；忙于；参与
The committee members are engaged in a heated debate about the new policy.
委员会成员正忙于就新政策进行激烈辩论。
与……订婚
She is engaged to a doctor she met during her internship.
她与实习时遇到的一位医生订婚了。
投入于；与……互动
The children were fully engaged with the interactive science exhibit.
孩子们完全投入互动科学展览中。
我们现在正在进行一场伟大的内战，考验这个国家，或任何一个如此孕育并献身于自由的国家，能否长久存续。（林肯《葛底斯堡演说》）
She is currently engaged in climate change research.
她目前正从事气候变化研究。
Use engaged naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
无名指戴上戒指→订婚；忙得没空抬头→被占用；聊起爱好两眼放光→投入。
语域：neutral 常见场景：wedding or engagement announcements、everyday conversations with friends and family 作“已订婚”讲时，通常用 be engaged to sb，语气中性，在正式公告和日常交谈中都比较自然。
表示忙于某事（搭配in/on/with），或已订婚（搭配to），注意英式英语中表示电话占线。
Dictionary facts from ECDICT, WIKTIONARY.