1
noun + thereon
正式/法律用语，相当于 on it/on that；此处后置修饰名词。
The contract lists the goods and the tax due thereon.
合同列出了货物及就此应缴的税款。
在其上；在那上面
先理解核心含义，再看它在真实句子里的用法。
在其上；在那上面
on that
The contract lists the goods and the tax due thereon.
合同列出了货物及就此应缴的税款。
在其上；在它上面
On that: on (top of) it.
关于那；关于它
About that: about it (concerning it, regarding it).
Please review the report and write your comments thereon.
请审阅报告并在其上写下你的意见。
The statue stood on the pedestal, and the plaque was mounted thereon.
雕像立在底座上，铭牌就安装在其上。
He laid the map on the floor and knelt thereon to study it.
他把地图铺在地板上，然后跪在上面仔细查看。
正式/法律用语，相当于 on it/on that；此处后置修饰名词。
The contract lists the goods and the tax due thereon.
合同列出了货物及就此应缴的税款。
常与 decide、rule、rely 等动词连用，表示“关于那一点/在那件事上”。
The board will decide thereon at the next meeting.
董事会将在下次会议上就此作出决定。
此义较古旧，指“其后立即/随后”，现代英语更常用 thereafter 或 then。
Thereon, the meeting came to a close.
随后，会议结束了。
Not this
Please put the cup thereon the desk.
Use this
Please put the cup on the desk.
thereon 是副词，意为“在那上面”，相当于“on it”，后面不能跟名词作宾语；要表示“在……上面”应直接使用介词 on。
Not this
I stayed in the hotel and met an old friend thereon.
Use this
I stayed in the hotel and met an old friend there.
thereon 特指“在那（物）上面”，不表示“在那个地方”。表达地点“在那里”应用副词 there。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
依赖于此；相信其上所述
You may rely thereon for accurate information.
你可以依赖其上所述，获取准确信息。
基于其上所述
The report was based thereon, so it must be correct.
该报告基于其上所述，因此必定正确。
其上所含的
All evidence thereon contained was reviewed.
其上所含的所有证据均经过审查。
其上所述的
The obligations thereon set forth shall be fulfilled.
其上所述的义务应予以履行。
写在其上的
The inscription thereon written is ancient.
写在其上的铭文是古代的。
Use thereon naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
there（那里）+ on（在…上）→ 就在那个东西的上面，把两半拼在一起记即可。
语域：formal 常见场景：法律文本、正式文书 thereon 属正式用词，多用于法律、合同或书面文件中，日常口语中很少使用。
thereon 的重音在第二个音节，读作 /ðeərˈɒn/。末尾的 /ɒn/ 与 on、upon、don、con 的拼写和读音一致，也与 gone、swan 押韵（尽管后两者的拼写不直观）。注意不要被拼写误导：therein（/ˌðeərˈɪn/）和 thereof（/ˌðeərˈɒv/）拼写相似，但元音不同，不与 thereon 押韵。
Dictionary facts from ECDICT, WIKTIONARY.