因此 英文怎麼說？5個常見英文表達與實用例句整理 [How to Say “Therefore” in English? 5 Common Expressions and Practical Examples]

在學習英文時，「因此」的翻譯與表達擁有多種可能。本篇報導從新聞、學術、專家觀點出發，整理五種最常見的英文表達方式：therefore、thus、so、as a result、consequently，提供例句、應用表格與場景比較。幫助你依照語境靈活運用因果觀念在口語與寫作中，避免常見錯誤，提高英文表達層次。

「因此 英文」的多元表達概觀

在英文中，「因此」根據正式程度、語境與用途有多種表達方式。下方表格列出最常見的五種寫法、適用場合與代表例句：

中文	英文	適用情境	例句
因此	therefore	正式、書面	The experiment failed; therefore, we need to start over.
因此	thus	正式、簡潔	Prices increased; thus, sales dropped.
因此	so	口語、非正式	I was late, so I missed the meeting.
因此	as a result	正式、常見	The project lacked funding. As a result, it was postponed.
因此	consequently	書面、學術報告	The data was incorrect; consequently, the conclusion is invalid.

這些用法彈性高，需根據溝通場合與所需語氣正確選擇。

五大常見「因此 英文」用法詳細解讀

Therefore 的用法與例句

Therefore 是最經典的「因此 英文」選擇，用於正式、書面場合，如學術論文、法律文件，特別強調「因果推論」：

• The city experienced heavy rainfall all week; therefore, several roads were flooded.
• She didn’t study hard for the exam. Therefore, she didn’t pass.

根據劍橋詞典，therefore 多位於句中，常以分號或句號隔開。

Thus 的用法與語境

Thus 常見於科學、專業寫作，直接承上啟下：

• The device failed the safety test. Thus, it cannot be sold to consumers.
• The model predicts rainfall correctly. Thus, it is reliable.

So 的使用場合

So 最常用於日常口語及簡報，語氣輕鬆，語法直接：

• It started to rain, so we cancelled the picnic.
• I lost my wallet, so I couldn’t buy a ticket.

語言學家建議：正式寫作優先考慮 therefore、thus，so 適用於口語或簡易文稿。

As a result 的應用

As a result 用於強調因果關係，多在段落開頭說明結果：

• The company launched a new product. As a result, sales increased significantly.
• Transportation was delayed due to the storm. As a result, many commuters were late.

連接詞	用法	語氣感受	用於句首	用於句中
therefore	強調推論、結論	很正式	稀少	常見
as a result	強調因果與結果	半正式	常見	常見

Consequently 的正式應用

Consequently 多見於新聞、學術、政策與專業書信，突出事件的直接合理結果：

• The law was not enforced properly; consequently, the crime rate increased.
• The system crashed during peak hours. Consequently, many users lost their data.

在學術報告與重大正式場合，Consequently 是 ideal 的過渡。更多專業連接詞技巧可參見 學術寫作中英文連接詞的應用。

「因此 英文」替換用語快速選擇指南

場景	建議用語	示範用途
日常對話	so	He was hungry, so he ate some cake.
電子郵件	as a result	We received your inquiry late. As a result, processing is delayed.
論文/學術	therefore	The hypothesis is incomplete; therefore, further research is needed.
新聞/政策	consequently	The river overflowed; consequently, nearby residents were evacuated.
科技/研發	thus	The prototype failed. Thus, we revised our design.

延伸用法與連接技巧

• Hence：語氣更為書面古典，多見於科學、哲學論述。
• For this reason：用於論述、評論加註說明。
• 這些連接詞大多連接兩個完整句子，前面常以分號或句號隔開。

實務建議與常見錯誤避免

專家提醒：靈活交替各種「因此」英文表達有助於文章更流暢。University of North Carolina 寫作中心建議避免濫用單一連接詞。

常見錯誤

• so 用於正式文章：正式論文應用 therefore/consequently。
• 重複單一用語：多元變換句型。
• 標點錯誤：therefore、thus 前加分號或句號，後接逗號。

錯誤用法	正確用法
He failed the exam, so, he was upset.	He failed the exam; therefore, he was upset.
The machine broke down. So, we called IT.	The machine broke down. As a result, we called IT.

場景例句匯總

英文表達	例句
therefore	Most stores were closed; therefore, we had to wait.
so	She forgot her umbrella, so she got wet.
thus	The forecast was wrong. Thus, we were unprepared.
as a result	The delivery was late. As a result, customers complained.
consequently	He missed the deadline; consequently, the project failed.

全球化與跨語言交流日益頻繁，正確選用多元「因此」英文表達多，能大幅提升你的寫作與口語層次。建議多閱讀不同語境文章，如 英文過渡詞的使用、論文中如何使用thus和consequently 等，並結合本篇實例練習，相信你能自信、精準展現因果關係，讓溝通更上層樓！