到底
On earth / after all; finally
HSK 4HSK 3.0 · 4
S + 到底 + question (question word / A不A) | 到底 + 谁/什么… | 到底 + V了 (finally)
到底 in questions shows impatience to get a final answer, 'on earth': 你到底去不去?. A 到底 question must use a question word or A不A form, NEVER 吗 (*你到底去吗). If the subject is a question word, 到底 precedes it: 到底谁说得对?. 到底 can also mean 'finally (after effort)' (他到底成功了) and 'after all' (他到底是个孩子), close to 终于 and 毕竟.
HSK 4–5 listening (impatience) and gap fills.
Examples
你到底去不去?
Are you going or not?
这到底是怎么回事?
What on earth is going on?
到底谁说的是真的?
Who on earth is telling the truth?
经过多次实验,他到底成功了。
After many experiments, he finally succeeded.
Exercises
1.你 想吃什么?快点儿决定吧。
2.Choose the correct sentence:
3. 谁拿了我的书?
4.这件事 是怎么回事?