How to use ‘to be’ (是 shì) in Mandarin Chinese
是 (shì): How to Use “To Be” in Mandarin Chinese
是 (shì) is one of the very first words you learn in Mandarin, and it looks easy: it means “to be.” But because the English words “am / is / are” do so many different jobs, learners keep reaching for 是 (shì) in places where Chinese doesn’t use it at all — and that single habit produces the most common beginner mistake there is.
This guide shows exactly when 是 (shì) is right, when it’s wrong, and what to say instead — using the everyday sentences you’ll actually speak.
是 (shì) is the Chinese word for “to be,” but it only links a subject to a noun that names an identity or category — a job, nationality, name, or type of thing: 我是老师 (Wǒ shì lǎoshī, “I am a teacher”). Never put 是 (shì) before an adjective — say 她很漂亮 (Tā hěn piàoliang, “She is pretty”), not 她是漂亮. To make it negative, add 不 in front: 不是 (bú shì). And unlike English, 是 (shì) never changes for tense or subject.
What 是 (shì) really means
是 (shì) has one job: it connects a subject to a noun that names who or what the subject is. Think of it as an equals sign. When you say 他是老师 (Tā shì lǎoshī), you’re saying 他 (tā, “he”) = 老师 (lǎoshī, “teacher”). It labels identities and categories: jobs, nationalities, names, relationships, and types of things.
What it does not do is describe qualities or feelings. “Tall,” “hot,” “happy,” “pretty” — those are adjectives, and in Chinese adjectives form their own kind of sentence without any “to be” verb at all. So 是 (shì) actually covers far less ground than English “is,” but within its lane it is essential — and it’s one of the first patterns you’ll meet after learning your first Chinese characters.
The basic sentence: Subject + 是 + Noun
The whole pattern fits in one line:
Subject + 是 (shì) + Noun (identity / category)
Negative: Subject + 不是 (bú shì) + Noun
是 (shì) never conjugates — it’s the same form for I, you, he, she, we, or they, and the same in past, present, or future. Here it is in action:
| Chinese | Pinyin | English | 是 links… |
|---|---|---|---|
| 他是老师。 | Tā shì lǎoshī. | He is a teacher. | a job |
| 我们是美国人。 | Wǒmen shì Měiguó rén. | We are American. | a nationality |
| 她是我妈妈。 | Tā shì wǒ māma. | She is my mom. | a relationship |
| 这是我的书。 | Zhè shì wǒ de shū. | This is my book. | a thing |
| 这不是我的书。 | Zhè bú shì wǒ de shū. | This is not my book. | the negative form |
When Chinese speakers use 是: 5 everyday moments
是 (shì) shows up any time you name, introduce, or categorize someone or something — which in practice is almost constantly. Here are the five situations where you’ll reach for it first:
Introduce yourself · 我是李明 Wǒ shì Lǐ Míng
Name
“I’m Li Ming.” The very first job of 是 (shì) — attaching your name to you.
Say your job · 她是医生 Tā shì yīshēng
Profession
“She’s a doctor.” Professions are nouns, so 是 (shì) is exactly right.
State a nationality · 他是法国人 Tā shì Fǎguó rén
Category
“He’s French.” Where someone is from is a category — 是 (shì) territory.
Describe a relationship · 她是我妈妈 Tā shì wǒ māma
Relationship
“She’s my mom.” Family and relationships are nouns too.
Correct a misunderstanding · 这不是咖啡，是茶 Zhè bú shì kāfēi, shì chá
Contrast
“This isn’t coffee — it’s tea.” 是 (shì) and 不是 (bú shì) often land in one breath, a very natural Chinese rhythm.
Cultural note. In Chinese social life, the first questions between new acquaintances are almost always about identity — your name, where you’re from, what you do. 是 (shì) is the backbone of all three answers, which makes it less a grammar point than a social survival tool.
Making 是 negative and asking questions
Two small moves turn a plain 是 (shì) statement into a negative or a question.
Negative: add 不 before 是
Put 不 (bù) in front: 我不是学生 (Wǒ bú shì xuésheng, “I’m not a student”). Note the tone change — 不 (bù) is normally fourth tone, but before the fourth-tone 是 (shì) it shifts to second tone, so it’s pronounced bú shì, not bù shì.
Yes/no questions: 吗 or 是不是
The easy way is to add 吗 (ma) to the end of a statement — no word-order change needed: 你是学生吗？(Nǐ shì xuésheng ma? “Are you a student?”). You can also use the A-not-A pattern 是不是 (shì bú shì): 你是不是学生？means the same thing. And 是吗 (shì ma?) tacked onto the end works like “…right?” or “…isn’t it?” to confirm something you already believe.
The #1 mistake: don’t use 是 with adjectives
GoEast Mandarin — a Shanghai-based school teaching Mandarin online and on campus since 2012, to learners in more than 50 countries — counts the 是-before-an-adjective slip among the first errors teachers correct with almost every beginner, which is why it gets its own section here.
This is the single most common error English speakers make, and it comes straight from English. In English, “is” links a subject to almost anything — “She is a teacher,” “She is pretty.” Chinese splits those two jobs. Nouns take 是 (shì); adjectives don’t.
Worked example. You want to say “She is pretty.” Because “is” feels essential in English, learners write 她是漂亮 (Tā shì piàoliang) — with 是.
Result: 她很漂亮 Tā hěn piàoliang is the correct sentence. 漂亮 (piàoliang, “pretty”) is an adjective, so 是 (shì) drops out entirely and 很 (hěn) links the subject to the quality instead.
很 (hěn) literally means “very,” but here it mostly works as the default connector between a subject and an adjective — it doesn’t always add strong emphasis. When you want real emphasis, swap in a stronger adverb like 非常 (fēicháng, “extremely”): 中国非常漂亮 (Zhōngguó fēicháng piàoliang, “China is extremely beautiful”).
A quick test if you’re unsure whether a word is a noun or an adjective: adjectives usually express an opinion (not everyone agrees someone is pretty), while nouns state a fact (someone really is Chinese). Opinion word → use 很 (hěn). Fact/label → use 是 (shì).
3 common 是 mistakes to avoid
All three come from the same root: assuming 是 (shì) behaves like English “to be.” Here’s what goes wrong and how to fix it.
| ❌ Wrong | ✅ Right | Why |
|---|---|---|
| 他是聪明 | 他很聪明 Tā hěn cōngming — “He’s smart.” |
聪明 (cōngming) is an adjective. Use 很 (hěn), never 是 (shì), before it. |
| 今天不是冷 | 今天不冷 Jīntiān bù lěng — “It’s not cold today.” |
To negate an adjective, put 不 (bù) directly in front of it — there’s no 是 (shì) to negate. |
| 我学生 | 我是学生 Wǒ shì xuésheng — “I’m a student.” |
是 (shì) is not optional the way English drops “am” in slang. Without it, the sentence is incomplete. |
If you want to keep hunting down beginner traps like these, we’ve collected more of them in our guide to common mistakes in beginner Chinese.
是 isn’t the only “to be”: 在, 有 and age
Because English “to be” is so broad, one Chinese word can’t cover all of it. When you’re tempted to use 是 (shì) but the meaning isn’t “X is a kind of Y,” you probably need a different word:
| English “to be” sense | Chinese word | Example |
|---|---|---|
| identity / category | 是 shì | 我是学生 Wǒ shì xuésheng — I am a student |
| location (“be at / in”) | 在 zài | 她在学校 Tā zài xuéxiào — She is at school |
| existence (“there is / have”) | 有 yǒu | 我有一个姐姐 Wǒ yǒu yí gè jiějie — I have an older sister |
| quality (“is + adjective”) | 很 hěn + adj | 今天很冷 Jīntiān hěn lěng — It’s cold today |
| age | …岁 …suì | 我二十五岁 Wǒ èrshíwǔ suì — I am 25 |
Notice the last row: age needs no “to be” verb at all — the number attaches straight to 岁 (suì, “years of age”). Getting a feel for these five buckets is most of what it takes to stop over-using 是 (shì).
是 at a glance
| Situation | Use 是? | Example |
|---|---|---|
| Noun — job, nationality, name, thing | ✅ Yes | 我是老师 Wǒ shì lǎoshī |
| Adjective — tall, happy, pretty | ❌ No — use 很 (hěn) | 他很高 Tā hěn gāo |
| Negative | 不是 (bú shì) — before nouns only | 这不是茶 Zhè bú shì chá |
| Past / future | No change — 是 stays the same | 昨天是星期一 Zuótiān shì xīngqīyī |
Key takeaways
- 是 (shì) links a subject to a noun — an identity or category — and never to an adjective.
- For adjectives, use 很 (hěn) instead: 她很漂亮, not 她是漂亮.
- Negate with 不是 (bú shì); 不 shifts to second tone before 是.
- 是 (shì) never conjugates — same form for every subject and every tense.
- “To be” also splits into 在 (zài) for location and 有 (yǒu) for existence.
Make 是 (shì) click in your first lesson
GoEast teachers get beginners using 是 (shì) — and dodging the 是/很 trap — naturally within the first 20 minutes. Try a free trial class with a real teacher.
Frequently asked questions
What does 是 (shì) mean in Chinese?
是 (shì) means “to be” (am / is / are), but it only links a subject to a noun that names an identity or category, such as a job, nationality, or name. It does not change for tense or subject.
Can you use 是 (shì) with adjectives?
No. Never put 是 (shì) before an adjective. Use 很 (hěn) instead: say 她很漂亮 (Tā hěn piàoliang, “She is pretty”), not 她是漂亮.
How do you make 是 (shì) negative?
Add 不 (bù) in front to get 不是 (bú shì). Because 是 is a fourth-tone word, 不 shifts to second tone, so it’s pronounced “bú shì.”
How do you ask a yes/no question with 是 (shì)?
Add 吗 (ma) to the end of a statement — 你是学生吗？(Nǐ shì xuésheng ma?) — or use the A-not-A pattern 是不是 (shì bú shì): 你是不是学生？Both mean “Are you a student?”
Does 是 (shì) change for past or future tense?
No. Chinese verbs don’t conjugate, so 是 (shì) stays the same. Time words show the tense instead: 昨天是星期一 (Zuótiān shì xīngqīyī, “Yesterday was Monday”).
What is the 是……的 (shì…de) structure?
It’s a separate, more advanced pattern that emphasizes when, where, or how something happened — similar to “it was … that …” in English. It’s different from the basic 是 (shì) sentence covered here.
Is 是 (shì) the only way to say “to be” in Chinese?
No. Use 在 (zài) for location, 有 (yǒu) for existence, 很 (hěn) plus an adjective for qualities, and just a number plus 岁 (suì) for age.
