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B1 Advanced Advanced Patterns

How to Emphasize with 就是 (jiùshì)

就(是) (jiù / jiùshì) before the predicate adds insistence — “just / exactly / simply,” often with a stubborn, flippant tone (任性). 就是 + Noun = “is exactly” (他就是我弟弟); … 就是 + Predicate = “only because” (她问这么多，就是担心你); 就(是) + (不) + Verb = flat refusal (我就不去). Different from the sequence 就 (“then”).

Why this trips learners up

You’ve met 就 (jiù) as “then / right away.” It has a second life as an emphasis word: placed before the predicate, 就 — very often 就是 — means “just / exactly / simply,” and it usually carries an insistent, even stubborn edge (Chinese calls this tone 任性, rènxìng). Think English “it’s just not right!” or “he IS the one.” It does three related jobs.

1. 就是 + Noun — “is exactly / precisely.” 就是 nails an identity down: 这就是我要找的书 (“this is exactly the book I wanted”), 站在门口的那个人就是我们的新老师 (“the person at the door is our new teacher”). Here the 是 cannot drop — 就 on its own can’t sit in front of a noun.

2. … 就是 + Predicate — “only because, and nothing else.” After describing a situation, 就是 pins the single reason behind it: 他不接电话，就是不想跟你说话 (“he’s not picking up only because he doesn’t want to talk to you”), 她问这么多，就是担心你 (“she asks so much only because she’s worried about you”). You could add 因为, but 就是 alone already says “for that reason and no other.”

3. 就(是) + (不) + Verb — flat insistence or refusal. Before an ordinary verb, 就 (or 就是) digs the heels in: 我就喜欢吃辣的 (“I just like spicy food”), 我就不去 (“I’m just not going”), 这个孩子就是不吃青菜 (“the kid simply won’t eat vegetables”). With a non-是 verb the 是 is optional; the bare 就 already emphasizes.

Keep this 就 apart from the sequence 就 (“then / as soon as”). Emphatic 就 stresses the predicate — 我就要这个 (“I want exactly this one”). Sequence 就 links two events in time — 买了就走 (“leave right after buying”). Same character, two jobs; here it’s the insistent one.

The structure

Subject 就是 jiùshì Other
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 Time Negation 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.

zhè 这 Subject jiùshì 就是 Pattern wǒ yào zhǎo de shū 我要找的书 Object

This is exactly the book I was looking for (就是 + noun — “is exactly”).

wǒ 我 Subject jiù 就 Pattern xǐhuan 喜欢 Verb chī là de 吃辣的 Object

I just like spicy food (emphatic 就 alone, before the verb).

nǐ bié quàn le 你别劝了 Time wǒ 我 Subject jiù 就 Pattern bù 不 Negation qù 去 Verb

Stop trying to talk me into it — I’m just not going (就 + 不 — stubborn refusal).

zhàn zài ménkǒu de nàge rén 站在门口的那个人 Subject jiùshì 就是 Pattern wǒmen de xīn lǎoshī 我们的新老师 Object

The person standing at the door is our new teacher (就是 + noun).

zhège háizi 这个孩子 Subject jiùshì 就是 Pattern bù 不 Negation chī 吃 Verb qīngcài 青菜 Object

This kid simply won’t eat his vegetables (就是 + 不 + verb).

tā bù jiē diànhuà 他不接电话 Time jiùshì 就是 Pattern bù xiǎng gēn nǐ shuōhuà 不想跟你说话 Verb

He’s not answering the phone only because he doesn’t want to talk to you (… 就是 — “only because”).

wǒ shuō zhèxiē 我说这些 Time jiùshì 就是 Pattern wèile nǐ hǎo 为了你好 Verb

I’m saying all this only because it’s for your own good (… 就是).

tā měitiān gěi nǐ dǎ diànhuà 她每天给你打电话 Time jiùshì 就是 Pattern tài guānxīn nǐ le 太关心你了 Verb

She calls you every day simply because she cares about you too much (… 就是).

Common mistakes

Avoid: 那个人就她的男朋友。 nàge rén jiù tā de nánpéngyou.
Say this: 那个人就是她的男朋友。 nàge rén jiùshì tā de nánpéngyou.

Why it happens: Before a NOUN you need the full 就是 — 就 on its own can’t link to a noun. It’s 那个人就是她的男朋友 (“that guy is exactly her boyfriend”), not 那个人就她的男朋友.

Avoid: 我喜欢吃辣的就。 wǒ xǐhuan chī là de jiù.
Say this: 我就喜欢吃辣的。 wǒ jiù xǐhuan chī là de.

Why it happens: Emphatic 就 goes BEFORE the predicate, never after it: 我就喜欢吃辣的 (“I just like spicy food”), not 我喜欢吃辣的就.

Avoid: 她问这么多就担心你。 tā wèn zhème duō jiù dānxīn nǐ.
Say this: 她问这么多就是担心你。 tā wèn zhème duō jiùshì dānxīn nǐ.

Why it happens: In the “only because” sense, keep the 是: 她问这么多就是担心你 (“she asks so much only because she’s worried”). Drop it and 就 reads as the sequence “then,” changing the meaning.

Compare & contrast

就 — emphatic (“just / exactly”)就 — sequence (“then / right away”)The difference
我就要这个wǒ jiù yào zhège买了就走mǎi le jiù zǒu我就要这个 = “I want exactly this one” (insistence on the predicate). 买了就走 = “leave right after buying” (one event right after another).
他就是不听tā jiùshì bù tīng他一来就走了tā yì lái jiù zǒu le他就是不听 = “he simply won’t listen” (stubborn emphasis). 他一来就走了 = “he left as soon as he arrived” (time sequence).
Rule of thumbIf 就 is stressing the predicate — “just / exactly / simply,” often stubbornly — it’s the emphatic 就(是): 我就不去, 他就是我弟弟. If 就 links two events in time — “as soon as / then” — it’s the sequence 就: 下课就回家. Before a noun, emphasis always needs the full 就是.

Try it yourself

Say “You’re just too polite.” — Subject + 就是 + predicate.

Related patterns

就就 (jiù): How to Say “Then” / “So”

The other 就: there it links events in time (“then / as soon as” — 下课就回家); here it stresses the predicate (“just / exactly”). Same character, two jobs.

 真真 (zhēn): How to Say “Really” / “So…!”

Both intensify: 真 colours an adjective with feeling (“really good!”), while 就是 insists on the whole predicate (“he simply won’t”).

 只只 (zhǐ): How to Say “Only”

就是 in its “only because” sense overlaps with 只: 只 narrows to one thing (只想…), 就是 pins the single reason (就是担心你).

 啊Sentence-Final 啊 (a): The Exclamation & Urgency Particle

Two ways to add force: 就是 builds the insistence into the sentence; sentence-final 啊 adds an emotional, exclamatory punch on top.

 吧Softening 吧 (ba): How to Sound Less Blunt (“…, Isn't It?”)

Opposite tones: 就是 digs the heels in (任性, stubborn); 吧 softens a statement into a gentle suggestion or guess.

 又不Emphasizing a Negation with 又 (yòu)

Two emphasis moves: 就是 digs in on a positive (“I just won’t / he IS the one”); 又 + 不/没 pushes back on a negative (“it’s not even…!”).

 中文，我喜欢Topic-Comment Sentences in Chinese: Putting the Topic First

Two emphasis tools at different levels: fronting a topic spotlights a whole phrase for the sentence (中文，我喜欢), while 就是 stresses one word inside the predicate (我就是喜欢). Sentence frame versus in-clause stress.

 连……都How to Say “Even” with 连……都 (lián… dōu)

Two emphasis tools: 连…都 spotlights a surprising extreme (“even…”), while 就是 digs in on the predicate (“he simply won’t”). Focus on the item versus insistence on the action.

 都怪你How to Say “It’s All Your Fault” with 都怪你 (dōu guài nǐ)

Both crank up the intensity with a small word: 就是 insists on a whole statement (他就是不听), while 都 in 都怪你 heaps all the blame on one culprit. Different words, same emphatic job.

 到底How to Use 到底 (dàodǐ): “What on Earth,” “After All” and “Finally”

Two emphasizers pulling opposite ways. 就是 nails down a statement (他就是不听, “he just won't listen”); 到底 digs into a question (你到底想怎么样？, “what on earth do you want?”). 就是 insists on an answer, 到底 demands one.

 究竟How to Say “What Exactly / On Earth” with 究竟 (jiūjìng)

Another emphasizer 究竟 keeps company with (上海究竟是上海，成本就是高). 就是 hammers a statement flat (“it just is that way”); 究竟 sharpens a question or fronts a decisive fact. Both insist, from opposite ends of the sentence.

 简直How to Say “Simply / Downright” with 简直 (jiǎnzhí)

The 就是 in 简直就是. 简直's “basically” use often stacks 就是 for force: 简直就是在抄我们的 (“basically just copying us”). 就是 nails the identification; 简直 turns it into hyperbole, “as good as.”
Quick reference card
Merry Mandarin How to Emphasize with 就是 (jiùshì) grammar.merrymandarin.com

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

Structure
Subject + 就是 + Other
Example
这就是我要找的书
This is exactly the book I was looking for (就是 + noun — “is exactly”).
Watch out
✗ 那个人就她的男朋友。  →  ✓ 那个人就是她的男朋友。