HSK 7
必定
bì dìng
必定 - Certainly, inevitably
Explanation
必定 (bìdìng) is a mood adverb (an adverb expressing the attitude or affirmative tone of a sentence), expressing something inevitable, certain to happen, or an unavoidable conclusion.
subject + 必定 (bìdìng) + 会 (huì – will) / 要 (yào) + verb/adjective; e.g. 必定会失败 (is bound to fail).
when reasoning about or strongly asserting a future outcome based on a stated condition (often following the hypothetical 若是/倘若 ruòshì/tǎngruò – if). Leans toward written usage, with a decisive affirmative tone.
必定 (bìdìng) emphasizes logical inevitability and has a more formal tone than 一定 (yídìng – certainly); 一定 can also express will or determination ('我一定去' I will definitely go), whereas 必定 is rarely used for one's own will.
avoid using 必定 for the speaker's subjective determination; for imperative or promise sentences use 一定 instead, not '我必定帮你'.
Examples
If there were a wife looking after him, his life would surely not be in such a mess.
If they attempt to artificially rescue this civilization, they are bound to fail.
Practice
Test your understanding with a quick quiz
Learn “必定” effectively
The grammar point “必定” (必定 - Certainly, inevitably) is one of the key structures at HSK 7. To use it fluently, you need to understand the contexts where it's used and practice regularly.
Study tip: read the examples aloud many times to build a natural reflex. Then try making your own sentences for your own situations. Use the audio button to hear and practice accurate pronunciation.
You can also view the full “” lesson to understand the related grammar and vocabulary more deeply.