语法 · HSK 3–4
到底 (dàodǐ) vs 终于 (zhōngyú): "On Earth / After All" vs "Finally"
终于 means "finally / at long last" in statements, showing that a long-awaited (usually hoped-for) result has happened: 春天终于来了, 我终于写完作业了. 到底 is used in questions (A-not-A, 还是 or question words) to press for a final answer ("on earth / after all"): 你到底去不去？ "Are you going or not?!" Never use 终于 in a question, and never use 到底 with 吗.
速查对比Quick comparison
句型Patterns
Subject + 终于 + Verb + 了Statement: at long last achieved.Subject + 到底 + A-not-A / Question word？Urgent question ("on earth / in the end"): 这到底是怎么回事？到底 + 是 + Noun（statement）"After all (as expected of…)": 到底是老手 "A veteran after all".
例句Examples
- 经过三年的努力，她终于考上了理想的大学。jīng guò sān nián de nǔ lì, tā zhōng yú kǎo shàng le lǐ xiǎng de dà xué.After three years of hard work, she finally got into her dream university.
- 你到底想吃什么？快决定吧！nǐ dào dǐ xiǎng chī shén me? kuài jué dìng ba!What on earth do you want to eat? Decide quickly!
- 明天你到底去不去？给我一个准话。míng tiān nǐ dào dǐ qù bu qù? gěi wǒ yí gè zhǔn huà.Are you going tomorrow or not? Give me a definite answer.
常见错误Common mistakes
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✗你终于去不去？
✓你到底去不去？
Pressing for an answer in a question uses 到底; 终于 is for statements.
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✗你到底知道吗？
✓你到底知不知道？ / 你到底知道什么？
到底 questions use A-not-A (知不知道), 还是 or a question word, never simple 吗.
重点词语Words in this guide
Common questions
Can 到底 also mean "finally"?
Yes, in statements, usually with 还是 or 了: 他到底还是来了 "He came in the end." 终于 is the everyday choice when a hoped-for result finally arrives.
What is the difference between 终于 and 最后 (zuìhòu)?
终于 carries a feeling of relief after waiting or trying hard (终于找到了); 最后 simply states the final item or what happened last in a neutral sequence (最后我们坐地铁回去了).