1
clause, whereupon clause
whereupon 为正式书面语，常用于逗号后，表示前一事件之后紧接着发生某事或产生某种结果。
He fell asleep, whereupon she slipped out of the room.
他睡着了，于是她悄悄溜出了房间。
此后；因此；此时。
先理解核心含义，再看它在真实句子里的用法。
此后；因此；此时。；在其上；据此。；因此；于是
After which; in consequence; at which point.
He fell asleep, whereupon she slipped out of the room.
他睡着了，于是她悄悄溜出了房间。
此后；因此；此时。
After which; in consequence; at which point.
在其上；据此。
Upon which.
He missed the deadline, whereupon he lost the contract.
他错过了截止日期，于是失去了那份合同。
The alarm rang, whereupon everyone left the building.
警报响起，于是所有人都离开了大楼。
She told him the truth, whereupon he apologized.
她把真相告诉了他，于是他道了歉。
whereupon 为正式书面语，常用于逗号后，表示前一事件之后紧接着发生某事或产生某种结果。
He fell asleep, whereupon she slipped out of the room.
他睡着了，于是她悄悄溜出了房间。
Not this
This is the city whereupon I was born.
Use this
This is the city where I was born.
whereupon 表示“随后”或“因此”，不表示地点；表示地点关系时应使用 where。
Not this
He explained the method whereupon the data was collected.
Use this
He explained the method whereby the data was collected.
whereby 表示“凭借、通过”，强调方式或手段；whereupon 强调时间先后或结果，不能用来表达方法。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
并且因此；于是
He missed the deadline, and whereupon the project was canceled.
他错过了截止日期，于是项目被取消了。
于是他；他因此
The witness hesitated, whereupon he told the whole story.
目击者犹豫了一下，于是他讲出了整个故事。
Use whereupon naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
where加上upon，想象一件事压在另一件事之上，因果或时间紧随其后，即‘因此、于是’。
语域：formal 常见场景：正式写作、公文或法律文书、叙事文学 whereupon 是比较正式甚至略带书面语色彩的连词，通常用于正式写作、公文或叙事文学中，口语中较少使用，多可用 and then 或 so 替代。
The final syllable /pɔn/ rhymes with 'upon', 'thereupon', 'pawn', 'dawn', 'lawn', and 'spawn'. The words 'upon' and 'thereupon' share the spelling pattern '-upon'. Do not pronounce the vowel as /ʌ/ (as in 'pun', /pʌn/); it is the open-mid back rounded vowel /ɔ/, like in 'dawn'.
Dictionary facts from ECDICT, WIKTIONARY.