由于/因为 (formal): due to
由于 (yóu yú) 是书面正式用语；因为 (yīn wèi) 是日常口语。
| | 由于 | 因为 |
|-|------|------|
| 语体 | 书面/正式 | 口语/日常 |
| 位置 | 常放句首 | 句首/句中均可 |
| 搭配 | 由于…因此/所以 | 因为…所以 |
| 例句 | 由于天气原因，航班延误了。 | 因为下雨，我没去。 |
结构: 由于 + 原因 + (因此/所以) + 结果
✅ 由于经济原因，公司决定裁员。(formal)
✅ 因为太累了，我没去参加聚会。(colloquial)
❌ 由于 cannot be paired with 因为 in the same sentence.
Worked examples
| Chinese | Pinyin | English | What it shows |
|---|---|---|---|
| 由于突降大雨，今天的户外活动不得不推迟。 | Yóu yú tū jiàng dà yǔ, jīn tiān de hù wài huó dòng bù dé bù tuī chí. | Due to sudden heavy rain, today's outdoor activities had to be postponed. | 由于 at sentence start + formal context (official activity) — typical written/formal pattern |
| 因为作业太多，他昨晚做到了凌晨两点才睡觉。 | Yīn wèi zuò yè tài duō, tā zuó wǎn zuò dào le líng chén liǎng diǎn cái shuì jiào. | Because there was too much homework, he worked until 2 AM before going to sleep. | 因为 — colloquial register; first-person narrative of an everyday situation |
| 由于长期缺乏运动，她的身体状况越来越差，医生建议她每天锻炼。 | Yóu yú cháng qī quē fá yùn dòng, tā de shēn tǐ zhuàng kuàng yuè lái yuè chà, yī shēng jiàn yì tā měi tiān duàn liàn. | Due to long-term lack of exercise, her health condition got worse and worse; the doctor advised her to exercise daily. | 由于 in a longer, more complex formal sentence; 越来越差 and doctor's advice give formal tone |
What you need first
Every topic in GraphChinese names its own prerequisites, and these are the grammar points this one is built on. If a sentence here will not parse, one of them is why.
What this opens up
These patterns list 由于/因为 (formal) among their own prerequisites, so they become readable once this one holds.
由于/因为 (formal) is one topic of 829. GraphChinese teaches them in prerequisite order, so this pattern reaches you on the day everything it rests on is proven. The whole course, HSK 0 through HSK 6, is $49 once for lifetime access.
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