Conjunctions / 连词

HSK 4 因为 vs 由于

because (informal/spoken) vs due to (formal/written) — same meaning, different register

Comparison / 对比

因为 yīnwèi由于 yóuyú
RegisterSpoken and written, neutralMore formal, often in writing/news
PairingOften pairs with 所以Often pairs with 因此/因而 (NOT 所以)
PositionCan be in either clauseAlmost always in the first clause
Special useCan answer 'why?' as a standalone replyCannot stand alone as a reply

Examples / 例句

因为: 因为下雨,所以我没去公园。
Yīnwèi xià yǔ, suǒyǐ wǒ méi qù gōngyuán.
Because it was raining, I didn't go to the park.
由于: 由于天气原因,今天的航班取消了。
Yóuyú tiānqì yuányīn, jīntiān de hángbān qǔxiāo le.
Due to the weather, today's flight has been cancelled.
Quick rule: Both mean 'because/due to'. 因为 is the everyday word — use it in conversation. 由于 sounds more formal — use it in writing, news reports, or official notices. KEY ERROR: 由于 pairs with 因此/所以 in writing, but never use 由于…就… or 由于…才…. Also: when answering 'why', say 因为…, never 由于….

Fill in the Blank / 填空练习

Type the correct word to complete each sentence. Press Enter or click Check.

身体不舒服,他没来上班。
你的帮助,我才能完成这个项目。
我没去看电影,我没买到票。

Quick Quiz / 小测验

A: 你为什么迟到?\nB: 堵车。
由于 cannot be used as a standalone reply to a question.
交通堵塞,会议被迫推迟到明天。
Formal news-style sentence → 由于 is more natural.
生病了,所以请了假。
Daily conversational tone → 因为. 由于…所以 is grammatical but stylistically clashing.

Real HSK 4 Test Questions Using 因为 or 由于 / 真题示例

2 actual HSK 4 questions from our mock exams that test the 因为 vs 由于 distinction:

From HSK 4 Mock Test 01 · Q59
排列顺序:
A 所以你喜欢哪种颜色
B 因为不同的颜色表示不同的性格
C 就说明你是哪种性格的人
A. ABCB. BAC ✓C. BCA
From HSK 4 Mock Test 01 · Q60
排列顺序:
A 因为工作的需要
B 所以我去过那里几次
C 对当地的文化有一些简单的了解
A. ABC ✓B. BACC. BCA

因为 vs 由于 FAQ

Are 因为 and 由于 interchangeable in HSK 4?

No. Although 因为 (yīnwèi) and 由于 (yóuyú) translate similarly into English, HSK 4 fill-in-the-blank and listening questions test exactly the distinction between them. Both mean 'because/due to'.

How is 因为 vs 由于 tested in HSK 4?

Most often in HSK 4 阅读 (reading) Part 1 选词填空 (Q46-55), where you choose the correct word for a blank in a sentence. Also appears in 听力 (listening) where the speaker uses one but the printed answer paraphrases with the other. Master both 因为 and 由于 collocations to lock in these points.

What's the quickest way to remember 因为 vs 由于?

Both mean 'because/due to'. 因为 is the everyday word — use it in conversation. 由于 sounds more formal — use it in writing, news reports, or official notices. KEY ERROR: 由于 pairs with 因此/所以 in writing, but never use 由于…就… or 由于…才…. Also: when answering 'why', say 因为…, never 由于…. Practice 3-5 fill-in-blank questions in our HSK 4 mock exams to lock the distinction.

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Use this HSK 4 distinction in real test conditions

⚡ Strategy
HSK 4 选词填空 (Q46-55) tips
📝 Patterns
100 essential HSK 4 sentences
🔧 Grammar
HSK 4 grammar guide (14 topics)
🎯 Practice
12 HSK 4 mock exams