Adverbs

HSK 4 一定 vs 可能

definitely vs maybe — certainty spectrum

Comparison / 对比

一定 yídìng可能 kěnéng
Certainty100%: 一定会来Uncertain: 可能会来
As adj.一定的道理Not adjective
Negative不一定 = not necessarily不可能 = impossible
ToneConfident/promiseHedging/cautious

Examples / 例句

一定: 我明天一定来,你放心吧。
Wǒ míngtiān yídìng lái, nǐ fàngxīn ba.
I will definitely come tomorrow.
可能: 他今天可能不来了。
Tā jīntiān kěnéng bù lái le.
He might not come today.
Quick rule: 一定 = definitely. 可能 = maybe. Key: 不一定 ≠ 不可能. 不一定 = not necessarily. 不可能 = impossible.

Fill in the Blank / 填空练习

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

放心吧,我会准时到的。
他没接电话,是在开会。
这件事不是他做的,别冤枉人。

Quick Quiz / 小测验

他那么努力,能考上好大学。
Confident expectation → 一定.
明天会下雨,你带把伞吧。
Uncertain weather → 可能.
这件事不是他做的。
不一定 = not necessarily → 一定.

Real HSK 4 Test Questions Using 一定 or 可能 / 真题示例

2 actual HSK 4 questions from our mock exams that test the 一定 vs 可能 distinction:

From HSK 4 Mock Test 01 · Q53
A:火车快开了,他怎么还没来?
B:他一般很准时的,可能是路上( ),别着急,再等等。
A 反映B 陪C 温度D 堵车 ✓E 来得及
From HSK 4 Mock Test 01 · Q67
我是前天到北京的,想借这次机会去长城看看,可是公司的事情很多,时间安排得很紧张。

★ 我最可能来北京:
A 旅游B 休息C 出差 ✓D 请假

一定 vs 可能 FAQ

Are 一定 and 可能 interchangeable in HSK 4?

No. Although 一定 (yídìng) and 可能 (kěnéng) translate similarly into English, HSK 4 fill-in-the-blank and listening questions test exactly the distinction between them. 一定 = definitely.

How is 一定 vs 可能 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 一定 and 可能 collocations to lock in these points.

What's the quickest way to remember 一定 vs 可能?

一定 = definitely. 可能 = maybe. Key: 不一定 ≠ 不可能. 不一定 = not necessarily. 不可能 = impossible. Practice 3-5 fill-in-blank questions in our HSK 4 mock exams to lock the distinction.

← 还是 vs 或者 All Confusable Words 应该 vs 必须 →

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