Connect a subject to a noun identity
Begin with someone or something you want to identify, add 是, and then give the identity. The final part can name a profession, a role, a nationality, or a particular person. Mandarin does not need a separate equivalent of English a before an ordinary occupation in this construction. Learn the whole sentence as a message rather than translating each English word into an obligatory slot. A profession can be expressed with a bare noun because the sentence tells us what kind of person the subject is, not how many people there are.
我是学生。
Wǒ shì xuésheng.
I am a student.
The noun after 是 names the speaker’s role. A singular English translation uses a, but this ordinary Mandarin identification does not require a number or classifier. The meaning comes from the complete subject and identity relationship.
她是医生。
Tā shì yīsheng.
She is a doctor.
The subject is followed by 是 and a profession noun. This is an identity statement about one person. The same connecting word will be used for another subject, so you can reuse the pattern without a conjugation table.
Keep the connecting word stable across subjects
The form 是 does not change to match I, you, he, she, or we. This differs from the English choices am, is, and are. Put the information about who is involved in the subject, then keep the predicate pattern stable. Mandarin personal pronouns can distinguish singular and plural, but ordinary nouns do not need an English style plural ending in every plural context. The written pronouns for he and she differ even though both are pronounced tā. These basic facts let you focus on identifying the subject without inventing a new verb form for it.
我们是学生。
Wǒmen shì xuésheng.
We are students.
The plural subject tells you that several people are included. 是 remains unchanged and 学生 can describe the group without a mandatory plural suffix. The sentence identifies the group rather than counting its members.
他也是老师。
Tā yě shì lǎoshī.
He is also a teacher.
The added word 也 comes before 是 and adds him to an already relevant comparison. The profession remains a noun. Notice that an extra meaning such as also changes word order around the verb, not the shape of 是.
Follow a complete example
Build a sentence with this meaning: We are students. Before looking at the answer, identify which information controls the grammatical choice.
- First, identify the message: We are students. Keep that message fixed while comparing forms. A sentence can be grammatical yet communicate something different, so meaning is part of the decision.
- The plural subject tells you that several people are included. 是 remains unchanged and 学生 can describe the group without a mandatory plural suffix. The sentence identifies the group rather than counting its members.
- Now read the complete sentence, 我们是学生。. Check the words surrounding your choice as well as the choice itself. Explain what would change if the speaker, number, or intended message changed. Then cover this example and reconstruct the sentence from the English cue.
我们是学生。 We are students.
References for this explanation
Deny an identity with 不 before 是
To deny the identity, place 不 directly before 是. Keep the subject before the negative phrase and the noun identity after it. Mandarin does not borrow an English helper such as do for this operation. In speech, 不 normally has a rising tone before the fourth tone of 是, though our Pinyin retains the dictionary spelling bù. A useful correction gives both the rejected identity and the accurate one. This makes the negative meaningful and helps you retrieve the positive pattern at the same time instead of practicing isolated negative fragments.
我不是老师。
Wǒ bù shì lǎoshī.
I am not a teacher.
不 negates 是, so the phrase denies the speaker’s identification as a teacher. Keep the two words together in the predicate. The absence of an English style helper is a feature of the Mandarin construction, not a missing word.
她不是医生，她是老师。
Tā bù shì yīsheng, tā shì lǎoshī.
She is not a doctor; she is a teacher.
The second clause supplies the corrected identity. Each clause follows the same subject and noun identity structure, while only the first is negative. This contrast makes clear which classification is rejected and which one is asserted.
References for this explanation
Ask and answer an identity question
For a basic question asking whether an identity is true, keep the statement order and place 吗 at the end. Do not move 是 before the subject by analogy with English. A compact affirmative reply can repeat 是, and a negative reply can use 不是. A full reply is often helpful for beginners because it rehearses the complete message. This echo method belongs to the predicate in the question. It does not make 是 the universal affirmative answer to questions about having, going, liking, or any other verb.
你是学生吗？
Nǐ shì xuésheng ma?
Are you a student?
The final neutral particle turns the identity statement into a question. The subject still precedes 是. The particle does not translate the English word are by itself; it marks the status of the complete proposition as a question.
你是老师吗？不，我不是老师。
Nǐ shì lǎoshī ma? Bù, wǒ bù shì lǎoshī.
Are you a teacher? No, I am not a teacher.
The reply denies the same predicate that the question proposed. Repeating the profession makes the answer easy to interpret. You can later shorten a clear answer to 不是 when the identity is already established in the exchange.
References for this explanation
Identify an object and distinguish country from person
The same connecting word can identify a thing introduced with this or that. It can also connect a person with a nationality noun. Pay attention to what the final noun actually names. A country name alone refers to a country, while a country name followed by 人 can identify a person from that country. This is a useful meaning contrast, not a universal instruction to add 人 to every place name without checking usage. Learn familiar nationality words as complete units and use them respectfully as descriptions people choose for themselves.
这是书。
Zhè shì shū.
This is a book.
这 introduces the thing being identified, and the noun names its category. No English style indefinite article is required. In another context this structure could identify a material or kind, so the situation helps interpret a bare noun.
她是中国人。
Tā shì Zhōngguó rén.
She is Chinese.
The final 人 makes this a noun phrase referring to a person associated with China. The whole phrase can serve as the identity after 是. The country name and the nationality expression refer to different kinds of things.
Use other constructions for descriptions and location
English uses be in many sentences that Mandarin builds differently. An ordinary adjective description can place 很 before the adjective, without 是. In a neutral statement, 很 does not always carry a strongly emphasized very meaning. A location statement commonly uses 在 with a place. These are beginner defaults, not a claim that 是 can never appear beside an adjective in any emphatic or contrasting construction. Learn the ordinary pattern first. When you meet an unfamiliar use later, identify the discourse context instead of treating every visible exception as a reason to abandon the basic distinction.
她很忙。
Tā hěn máng.
She is busy.
忙 describes a state rather than naming a profession or identity. 很 supplies a common ordinary description pattern. Its presence here does not force the English translation very busy if the speaker is simply reporting the situation.
老师在学校。
Lǎoshī zài xuéxiào.
The teacher is at school.
在 introduces the location of the teacher. The sentence locates a person whose identity is already known. That differs from identifying somebody as a teacher, so the predicate must express location rather than classification.
Try the reasoning with less help
Build a sentence with this meaning: She is busy. Before looking at the answer, identify which information controls the grammatical choice.
- First, identify the message: She is busy. Keep that message fixed while comparing forms. A sentence can be grammatical yet communicate something different, so meaning is part of the decision.
- 忙 describes a state rather than naming a profession or identity. 很 supplies a common ordinary description pattern. Its presence here does not force the English translation very busy if the speaker is simply reporting the situation.
- Now read the complete sentence, 她很忙。. Check the words surrounding your choice as well as the choice itself. Explain what would change if the speaker, number, or intended message changed. Then cover this example and reconstruct the sentence from the English cue.
Compare your reasoning
她很忙。 She is busy.
Keep possession, age, and names distinct
Possession uses 有, while a basic age statement can put the number and 岁 after the person without 是. A name can be introduced with 叫, and 是 can identify someone as a named person when that is the intended message. These constructions overlap in English translation but remain distinct Mandarin patterns. Build a small decision routine: am I identifying someone, describing a state, locating someone, saying what they have, or giving an age? Choose the construction after answering that question. This routine is more reliable than searching for a single equivalent of every English occurrence of be.
我有一本书。
Wǒ yǒu yī běn shū.
I have a book.
有 expresses possession and introduces the thing possessed. The number and classifier specify one book. The noun phrase is not an identity for the speaker, so the presence of a noun after the predicate does not by itself require 是.
我二十岁。
Wǒ èrshí suì.
I am twenty years old.
The basic age statement uses the number followed by 岁 directly after the subject. Mandarin does not need 是 merely because English uses am in the translation. This pattern describes an age, not a profession or nationality.
Notice the difference
Common mistakes
Do not use the identity word for ordinary location
Instead of老师是学校。
For this meaning老师在学校。
The incorrect sentence connects teacher and school as identities. The intended message locates a teacher at school, so 在 is the relevant predicate. Decide whether the second noun tells what the person is or where the person is. This simple meaning check is more helpful than counting nouns or copying the English verb is. Pinyin for the correction is Lǎoshī zài xuéxiào.
Negate the predicate actually used
Instead of我没有老师。
For this meaning我不是老师。
The first sentence is grammatical but means I do not have a teacher. It is wrong only for the intended message I am not a teacher. 没有 belongs with possession or existence, whereas 不是 denies an identity. A correction should therefore explain the changed meaning instead of labeling every alternative an impossible Mandarin sentence. Both patterns are useful when their messages match the situation.
Keep statement order in a particle question
Instead of是你学生吗？
For this meaning你是学生吗？
The subject remains before 是 when 吗 marks the question. English commonly changes the order of subject and be, but the Mandarin particle makes that operation unnecessary here. Start with the statement, then add the final particle. The correction is Nǐ shì xuésheng ma? Once you can ask it, practice a matching reply with 是 or 不是 rather than memorizing the question alone.
From understanding to using
Make your own example.
Try these without answer choices. Say your answer aloud or write it below, then compare your reasoning with the model.
Your turn 1
Introduce yourself as a student, deny that you are a teacher, and add that you have a book.
Compare with a model
我是学生。我不是老师。我有一本书。
I am a student. I am not a teacher. I have a book.
The first two sentences classify the speaker, so they use 是 and 不是. The third expresses possession and changes the predicate to 有. Keep that change even though the book is also a noun. The relevant decision is the relationship you are expressing: identity or possession. The book phrase includes 一 and the classifier 本. Pinyin: Wǒ shì xuésheng. Wǒ bù shì lǎoshī. Wǒ yǒu yī běn shū. Read the negative with its usual spoken tone change, then cover the model and reconstruct all three messages.
- Did you preserve the requested meaning?
- Does the form match the person or noun in your message?
- Can you explain your choice before looking at the model?
Your turn 2
Say that she is a doctor, she is busy, and she is at school. Explain why the three predicates differ.
Compare with a model
她是医生。她很忙。她在学校。
She is a doctor. She is busy. She is at school.
A profession is a noun identity, a busy state is an adjective description, and being at school is a location. These distinctions select 是, 很 with an adjective, and 在 with a place. Keep the same subject while changing the kind of information after it. This controlled comparison shows why the repeated English word is cannot determine the Mandarin structure on its own. Pinyin: Tā shì yīsheng. Tā hěn máng. Tā zài xuéxiào. After checking, replace the person and keep the same three constructions.
- Did you preserve the requested meaning?
- Does the form match the person or noun in your message?
- Can you explain your choice before looking at the model?
Put it into practice
Make the next choice.
Choose a response and learn why it works. Your score reflects your first answer to each question. You can revisit anything you miss.
Choose an answer, then open the explanation to check your reasoning.
Question 1
Complete the sentence for this meaning: I am a student.
我是___。
- 学生
- 学习
Check the answer
Answer: 学生
学生: The noun after 是 names the speaker’s role. A singular English translation uses a, but this ordinary Mandarin identification does not require a number or classifier. The meaning comes from the complete subject and identity relationship.
学习: This word means study or learn. Replacing the noun student with the verb study does not preserve the requested identity sentence. First decide whether you need a person noun or an action.
Question 2
Complete the sentence for this meaning: She is a doctor.
她___医生。
- 有
- 是
Check the answer
Answer: 是
有: 有 expresses having or existence. It would say that she has a doctor, a different relationship from identifying her profession. A grammatical alternative can still fail to express the intended message.
是: The subject is followed by 是 and a profession noun. This is an identity statement about one person. The same connecting word will be used for another subject, so you can reuse the pattern without a conjugation table.
Question 3
Complete the sentence for this meaning: We are students.
我们___学生。
- 是
- 们是
Check the answer
Answer: 是
是: The plural subject tells you that several people are included. 是 remains unchanged and 学生 can describe the group without a mandatory plural suffix. The sentence identifies the group rather than counting its members.
们是: The plural marker belongs inside a suitable plural pronoun such as 我们. It does not become an extra prefix attached to 是 to make the predicate plural.
Question 4
Complete the sentence for this meaning: He is also a teacher.
他也是___。
- 教
- 老师
Check the answer
Answer: 老师
教: 教 is a verb meaning teach. The requested sentence identifies a teacher, so it needs the noun 老师. Knowing that somebody teaches and identifying their role are related but differently constructed messages.
老师: The added word 也 comes before 是 and adds him to an already relevant comparison. The profession remains a noun. Notice that an extra meaning such as also changes word order around the verb, not the shape of 是.
Question 5
Complete the sentence for this meaning: I am not a teacher.
我___老师。
- 不是
- 没有
Check the answer
Answer: 不是
不是: 不 negates 是, so the phrase denies the speaker’s identification as a teacher. Keep the two words together in the predicate. The absence of an English style helper is a feature of the Mandarin construction, not a missing word.
没有: 没有 denies possession or existence with 有. It would say that the speaker does not have a teacher, which differs from denying that the speaker is a teacher.
Question 6
Complete the sentence for this meaning: She is not a doctor; she is a teacher.
她不是医生，她___老师。
- 不
- 是
Check the answer
Answer: 是
不: 不 alone cannot replace the positive connecting word in this slot. It would also introduce a denial where the meaning requires the corrected positive identity.
是: The second clause supplies the corrected identity. Each clause follows the same subject and noun identity structure, while only the first is negative. This contrast makes clear which classification is rejected and which one is asserted.
Question 7
Complete the sentence for this meaning: Are you a student?
你是学生___？
- 吗
- 呢
Check the answer
Answer: 吗
吗: The final neutral particle turns the identity statement into a question. The subject still precedes 是. The particle does not translate the English word are by itself; it marks the status of the complete proposition as a question.
呢: 呢 commonly asks a contextual follow up such as and you, but it is not the ordinary replacement for 吗 in this full neutral question about whether an identity is true.
Question 8
Complete the sentence for this meaning: Are you a teacher? No, I am not a teacher.
你是老师吗？不，我___老师。
- 没有
- 不是
Check the answer
Answer: 不是
没有: The question asked whether the listener is a teacher, not whether the listener has one. 没有 would answer a possession question and would leave this identity question mismatched.
不是: The reply denies the same predicate that the question proposed. Repeating the profession makes the answer easy to interpret. You can later shorten a clear answer to 不是 when the identity is already established in the exchange.
Question 9
Complete the sentence for this meaning: This is a book.
这是___。
- 书
- 谁
Check the answer
Answer: 书
书: 这 introduces the thing being identified, and the noun names its category. No English style indefinite article is required. In another context this structure could identify a material or kind, so the situation helps interpret a bare noun.
谁: 谁 asks who and would create a question about a person’s identity. The requested message identifies an object as a book, so a question word does not belong in the noun slot.
Question 10
Complete the sentence for this meaning: She is Chinese.
她是___。
- 中国
- 中国人
Check the answer
Answer: 中国人
中国: 中国 names China, the country. Saying that a person is the country does not express the intended nationality. Preserve the person meaning by using the complete identity phrase.
中国人: The final 人 makes this a noun phrase referring to a person associated with China. The whole phrase can serve as the identity after 是. The country name and the nationality expression refer to different kinds of things.
Question 11
Complete an ordinary neutral description, without emphatic contrast: She is busy.
她___忙。
- 很
- 是
Check the answer
Answer: 很
很: 忙 describes a state rather than naming a profession or identity. 很 supplies a common ordinary description pattern. Its presence here does not force the English translation very busy if the speaker is simply reporting the situation.
是: An ordinary neutral adjective description does not insert 是 as an English style linking verb. Special emphatic uses exist, but they are not the target construction for this basic statement.
Question 12
Complete the sentence for this meaning: The teacher is at school.
老师___学校。
- 是
- 在
Check the answer
Answer: 在
是: 是 would connect the teacher with a noun identity. It does not replace 在 to say where the teacher is located in this ordinary sentence.
在: 在 introduces the location of the teacher. The sentence locates a person whose identity is already known. That differs from identifying somebody as a teacher, so the predicate must express location rather than classification.
Question 13
Complete the sentence for this meaning: I have a book.
我___一本书。
- 有
- 是
Check the answer
Answer: 有
有: 有 expresses possession and introduces the thing possessed. The number and classifier specify one book. The noun phrase is not an identity for the speaker, so the presence of a noun after the predicate does not by itself require 是.
是: This would identify the speaker as a book. The intended relationship is possession, so use 有. Look at the relationship between the two noun phrases, not only at their presence.
Question 14
Complete an ordinary age statement, without emphasis: I am twenty years old.
我___岁。
- 是二十
- 二十
Check the answer
Answer: 二十
是二十: In the ordinary age statement being practiced, 是 is unnecessary. Emphatic or contrastive contexts can add structure, but the plain beginner answer is the number followed by 岁.
二十: The basic age statement uses the number followed by 岁 directly after the subject. Mandarin does not need 是 merely because English uses am in the translation. This pattern describes an age, not a profession or nationality.
Keep the conversation going
What to practice next
Return to the production tasks after a break. Reconstruct your sentences without the models, compare the meaning and form, and repair any error by explaining its cause. Then use one sentence in a short exchange of your own.
Sources and editorial notes
By Loquus ·
Source checked with AI assistance
These original explanations synthesize the cited sources. They have not been certified by an independent human language specialist. Standard Mandarin with simplified characters and Pinyin is taught, with relevant usage boundaries explained. Report a correction in the discussion below.
- MIT OpenCourseWare, Julian Wheatley: Unit 1
- MIT OpenCourseWare, Julian Wheatley: Unit 2
- MIT OpenCourseWare, Julian Wheatley: Unit 3
- MIT OpenCourseWare, Julian Wheatley: Unit 4
- MIT OpenCourseWare, Julian Wheatley: Character Lesson 2
- MIT OpenCourseWare, Julian Wheatley: Character Lesson 3
- Oxford Chinese Teaching Centre: Sample lesson grammar
- Michigan State University, Wenying Zhou: Lesson 2 Dialogue 1: Talking About a Photo
- Michigan State University, Wenying Zhou: Lesson 2 Dialogue 2: Talking About Family Members
- Michigan State University, Wenying Zhou: Lesson 3 Dialogue 1: Schedule a Time to Meet
Learning research behind the practice
Worked examples, retrieval practice, and later review inform the activities. These studies do not establish the effectiveness of this specific lesson.
- Karpicke and Roediger: The critical importance of retrieval for learning
- Butler and Roediger: Feedback enhances the positive effects and reduces the negative effects of multiple choice testing
- Institute of Education Sciences: Organizing Instruction and Study to Improve Student Learning
- Rittle Johnson and Star: Compared to what?