B1 Intermediate Sentence Structure

How to Show Certainty with Sentence-Final 的 (de)

Besides its structural jobs, 的 (de) can sit at the very end of a sentence to mark certainty: the speaker is sure, reassuring, or making a promise. Statement + 的. 他会好的 (“he'll get better, trust me”), 你可以的 (“you can do this”), 她一定会来的 (“she'll definitely come”). It loves the verb 会, giving the 会…的 frame for a confident prediction.

Why this trips learners up

You already know 的 (de) as a structural particle, the one that links 我的书 (“my book”) or 漂亮的花 (“pretty flowers”). It has another, quite separate job: dropped at the very end of a sentence, 的 marks certainty. The speaker is saying “I'm sure of this,” often to reassure or to promise. The frame is just Statement + 的: 他会好的 (“he'll be fine, trust me”), 你可以的 (“you can do it”), 我不会骗你的 (“I won't lie to you, I promise”).

This 的 most often rides the verb 会 (huì), and frequently 一定会 (yídìng huì) for extra conviction: 会 + … + 的 is the standard frame for a confident prediction about what will happen. 她一定会来的 (“she'll definitely come”), 你们会成功的 (“you'll succeed”), 这个问题我们会解决的 (“we'll sort this out”). The 会 looks to the future; the 的 stamps it with the speaker's certainty.

It doesn't have to be about the future. 的 can also press a firm fact, especially with 过: 这个地方我们来过的 (“we've definitely been here before”), 这件事我提醒过你的 (“I did remind you about this”). Here 的 adds a “believe me, it's so” to something you're certain of.

Two things to watch. First, the certainty 的 sits at the end of the whole statement, never between 会 and the verb: 你会成功的, not 你会的成功. Second, because it asserts confidence, it clashes with hedges like 可能 or 也许, and it is not interchangeable with sentence-final 了: 会好的 reassures about what will be, while 好了 reports a change that has happened. (You can even meet both 的 in one sentence: 你的中文会越来越好的, where the first 的 is possessive and the last one is this certainty 的.)

The structure

Other 的 de

Colour key

Each colour marks one grammatical role — and the same colour means the same role on every page in the Lab.

Pattern Subject Verb Object Negation Adverb Function word Other

Examples in context

Real-world sentences, easiest first. Toggle pinyin or the translation, tap any word to see its role, or play the audio.

Tap a word to see its grammatical role.

bié dānxīn 别担心 Other yíqiè ，一切 Subject dōu 都 Adverb huì 会 Function word hǎo 好 Verb de 的 Pattern

Don't worry, everything will be fine (会…的: a reassuring certainty).

nǐ 你 Subject yídìng 一定 Adverb néng 能 Function word zuòdào 做到 Verb de 的 Pattern

You'll definitely be able to do it (一定能…的: encouragement).

wǒ 我 Subject bù 不 Negation huì 会 Function word wàngjì 忘记 Verb nǐ 你 Object de 的 Pattern

I won't forget you (不会…的: a promise).

tā zhème nǔlì 他这么努力 Other chízǎo ，迟早 Adverb huì 会 Function word chénggōng 成功 Verb de 的 Pattern

He works so hard, he'll succeed sooner or later (a confident prediction).

zhè bù diànyǐng 这部电影 Object wǒ 我 Subject kàn 看 Verb guo 过 Function word de 的 Pattern jiéjú hěn gǎnrén ，结局很感人 Other

I've definitely seen this movie, the ending is very moving (过…的: asserting a firm fact).

zhè jiàn shì 这件事 Object wǒ 我 Subject tíxǐng 提醒 Verb guo 过 Function word nǐ 你 Object de 的 Pattern nǐ wàng le ma ，你忘了吗 Other

I did remind you about this, have you forgotten? (过…的: insisting on a fact).

nǐ fàngxīn 你放心 Other wǒmen ，我们 Subject yídìng 一定 Adverb huì 会 Function word zhǔnshí dào 准时到 Verb de 的 Pattern

Rest assured, we'll definitely arrive on time (一定会…的: a reassuring promise).

zhǐyào jiānchí xiàqù 只要坚持下去 Other nǐ de zhōngwén ，你的中文 Subject huì 会 Function word yuèláiyuè hǎo 越来越好 Verb de 的 Pattern

As long as you keep at it, your Chinese will get better and better (note the two 的: possessive 你的, then the certainty 的).

Common mistakes

Avoid: 你一定会的成功。 nǐ yídìng huì de chénggōng.

Say this: 你一定会成功的。 nǐ yídìng huì chénggōng de.

Why it happens: The certainty 的 closes the whole statement; it never sits between 会 and the verb. “You'll definitely succeed” is 你一定会成功的, not 你一定会的成功. (That mid-sentence slot belongs to the structural 的.)

Avoid: 他可能会赢的。 tā kěnéng huì yíng de.

Say this: 他一定会赢的。 tā yídìng huì yíng de.

Why it happens: 的 asserts that you're sure, so it clashes with hedges like 可能 / 也许 (“maybe”). If you're confident, drop the hedge: 他一定会赢的. If you really mean “maybe,” drop the 的: 他可能会赢.

Avoid: 别担心，一切都会好了。 bié dānxīn, yíqiè dōu huì hǎo le.

Say this: 别担心，一切都会好的。 bié dānxīn, yíqiè dōu huì hǎo de.

Why it happens: 会…的 reassures about what will be; 了 reports a change that has happened. “Everything will be fine” is 一切都会好的, not 一切都会好了 (which would mean it has already turned out fine). Look ahead with 的, mark a change with 了.

Compare & contrast

会…的: confident about what will be	…了: a change that has happened	The difference
他会好的tā huì hǎo de	他好了tā hǎo le	他会好的 looks ahead: “he'll get better” (you're reassuring, it hasn't happened yet). 他好了 reports the change: “he's better now” (it already happened). 的 is certainty about the future; 了 marks what has become.
你会瘦的nǐ huì shòu de	你瘦了nǐ shòu le	你会瘦的 is “you'll slim down, don't worry” (a confident prediction). 你瘦了 is “you've lost weight” (a change that already shows). Same adjective, opposite time frame.

Rule of thumbUse Statement + 的 (often 会…的) to sound confident or reassuring about something not yet confirmed, usually still to come: 会好的, 一定会来的, 不会骗你的. Use 了 to report a change that has already happened: 好了, 来了, 瘦了. 的 is the speaker's certainty about what will be; 了 marks what has become.

Try it yourself

Say “You'll definitely succeed.” End with 的 to make it a confident reassurance.

Related patterns

Quick reference card

How to Show Certainty with Sentence-Final 的 (de) grammar.merrymandarin.com

A pocket summary — print it and keep it by your desk.

Structure

Other + 的

Example

别担心，一切都会好的

Don't worry, everything will be fine (会…的: a reassuring certainty).

Watch out

✗ 你一定会的成功。 → ✓ 你一定会成功的。