由于天气原因，航班取消了 (yóuyú tiānqì yuányīn, hángbān qǔxiāo le) — "Due to weather conditions, the flight was cancelled." That sentence shows 由于 (yóuyú) at work: the start of a formal sentence, introducing the cause before the result. In Mandarin, 由于 means "Due To / Because Of (Formal Cause)" and functions like "due to" in English — it always comes first, never mid-sentence.
The structure is 由于 + Reason，Result. Place 由于 at the beginning, state the cause, add a comma, then give the outcome. In 由于天气原因，航班取消了, the reason is 由于天气原因 (due to weather conditions) and the result is 航班取消了 (the flight was cancelled). This is formal, polished Chinese — the register of news reports, public announcements, and professional emails, not everyday conversation.
In this lesson you talk out loud with AI teacher Mei Lin in real time — voice, not typing. Each lesson targets one grammar pattern and takes about 10 minutes. Mei Lin corrects your grammar and pronunciation as you converse and adapts to your level. You'll practice Giving Formal Reasons by explaining why events happened, using 由于 in full spoken sentences. The first lesson is free to try.
For more at this level, visit the HSK 4 lessons hub page, or try another HSK 4 live lesson on 正好 (zhènghǎo) and another HSK 4 live lesson on 难道 (nándào). You can also print practice sheets with the free printable Chinese worksheet generator.
由于 (yóuyú) is for formal contexts — news reports, public announcements, professional emails. It always goes at the start of the sentence, never mid-sentence. Use it when you want a polished, formal tone for Giving Formal Reasons, rather than casual conversation where simpler patterns would do.
In this live conversation lesson, you talk out loud with AI teacher Mei Lin and practice the 由于 + Reason，Result structure in real spoken sentences. You'll explain why events happened in a formal register — like a news report or professional email. Mei Lin corrects your grammar and pronunciation as you speak.
Yes — you can print handwriting worksheets with the free Chinese Worksheet Generator. Ready-made packs cover HSK 1–3 words, so you may not find a pack matching this specific lesson, but the tool lets you reinforce characters you encounter at this level.