Build numbers from tens and units
Learn the numbers one through ten as vocabulary, then notice the regular structure of ordinary numbers below one hundred. Eleven is ten plus one, twenty is two tens, and twenty three is two tens plus three. The written sequence follows that structure without an equivalent of English and. Recognizing the components is more useful than memorizing each number as an unrelated sound. Keep counting separate from reading a string of digits such as a year or code, where each digit may be named individually. The same symbols can support different reading tasks depending on their purpose.
十一
shíyī
eleven
The number is built from ten followed by one. You do not need to insert a separate word corresponding to plus or and. This is a whole number reading, not two independent digits in a code.
二十三
èrshísān
twenty three
二十 supplies two tens and 三 adds three units. The initial 二 is part of a compound number, so it does not become 两 merely because the complete number may later count objects.
Distinguish 二 from 两
Both 二 and 两 can correspond to English two, but they have different common environments. Use 二 when counting in sequence and within the number twenty. Before an ordinary classifier, a quantity of two usually uses 两. This beginner distinction is deliberately narrow. Larger units, fractions, decimals, fixed expressions, and regional habits introduce additional patterns that you can learn later. Avoid the misleading rule that one form is for people and the other for things. The grammatical environment, rather than whether the noun is human, explains the basic contrast practiced here.
两个人
liǎng gè rén
two people
The number immediately precedes the classifier 个, so 两 is the usual beginner form. 人 names the people being counted. The classifier organizes the phrase; it is not an English plural ending attached to the noun.
二十个人
èrshí gè rén
twenty people
The number is twenty, whose structure uses 二十. Only after that complete number comes 个 and the noun. Do not let the later classifier change the internal construction of the number itself.
Follow a complete example
Build two people and twenty people. Identify the complete number before adding the classifier.
- For a quantity of two immediately before the ordinary classifier 个, choose 两. Combine the number with 个 and then 人 to obtain 两个人.
- For twenty, first build the compound number 二十. Its initial 二 belongs inside that number, so the later classifier does not turn it into 两. Add 个 and 人 after the complete number.
- Compare the two phrases while holding the classifier and noun constant. The change concerns the grammatical environment of the number two, not whether you are counting people or objects.
两个人 means two people. 二十个人 means twenty people.
Choose a classifier with the noun
Different nouns conventionally take different classifiers. Begin with a useful small set: 本 for books, 张 for many flat items such as sheets and photos, and 个 for people and many other common nouns. The general classifier is useful, but it is not a reason to replace every more specific classifier when you know the usual form. Learn a complete phrase with each new noun. The semantic tendencies can help memory, yet they are not an infallible classification system that lets you predict every pairing without checking a dictionary or a reliable example.
三本书
sān běn shū
three books
本 is the conventional classifier for books in this basic phrase. The number precedes it and the noun follows it. The noun itself does not need an added plural ending because the quantity already makes the number explicit.
四张照片
sì zhāng zhàopiàn
four photos
张 is a common classifier for photographs. Learn the number, classifier, and noun as a connected phrase so that the classifier is retrieved with the object instead of added as an afterthought during speech.
Count containers and amounts
A measure word can describe an amount or container, not only classify an individual object. 杯 counts cupfuls or glassfuls in drink phrases, and 瓶 counts bottles. The resulting phrase can refer to tea, water, or coffee without treating the substance itself as a collection of individual objects. Pay attention to what the number counts: two cups of tea is an amount of tea served in cups, while two empty cups requires a noun phrase about cups as objects. This meaning check keeps a useful classroom shortcut from becoming the mistaken claim that every classifier works in exactly the same way.
两杯茶
liǎng bēi chá
two cups of tea
杯 supplies the serving unit, and 茶 names the drink. Because the quantity two precedes that unit, 两 is natural here. The phrase counts cupfuls of tea, not two unspecified individual tea objects.
一瓶水
yī píng shuǐ
one bottle of water
瓶 identifies the container or amount being counted. Our Pinyin keeps the dictionary tone of 一; before the second tone píng it is commonly pronounced with a falling tone in connected speech. Keep the spelling convention separate from the spoken adjustment.
Use classifiers with this and that
A demonstrative such as 这 or 那 commonly combines with a classifier and noun when you point to a particular item. The classifier still belongs with the kind of noun involved, even though there is no overt number. Compare this book with three books: the first element changes, while 本书 remains a useful unit. A short identification such as 这是书 has a different structure, because the demonstrative stands as the subject rather than modifying a noun inside one phrase. Recognize that boundary instead of trying to insert a classifier after every occurrence of this or that.
这本书
zhè běn shū
this book
The demonstrative and classifier combine with 书 to make one noun phrase. 本 matches the book noun just as it does in a counted phrase. The phrase can then become the subject or object of a complete sentence.
那个人
nà gè rén
that person
个 is a common classifier for a person in this neutral phrase. The demonstrative identifies which person is meant. Other classifiers can add distinctions such as courtesy, but this lesson gives a useful basic choice without claiming it is the only possible one.
References for this explanation
Ask for a quantity with 几
To ask how many in a context where a relatively small number is expected, 几 commonly takes the place of the number before the classifier. Keep the classifier and noun after it. A useful answer replaces 几 with the actual quantity while leaving the rest of the phrase stable. 多少 is another quantity question word, especially when the possible amount is open, and its classifier behavior can differ. Do not turn the small quantity tendency into an absolute rule forbidding 几 beyond a particular digit. The practical beginner skill is to preserve the noun phrase while asking and answering.
你有几本书？
Nǐ yǒu jǐ běn shū?
How many books do you have?
几 fills the unknown number position before 本书. The possession predicate 有 remains unchanged. Because the quantity word already asks for missing information, the ordinary question does not need an added final 吗.
我有两本书。
Wǒ yǒu liǎng běn shū.
I have two books.
The answer replaces the unknown quantity with 两 before the classifier 本. This preserves the structure of the question while providing the requested number. Notice that the book noun stays the same even though the amount is more than one.
Try the reasoning with less help
Ask how many books the listener has, then answer that you have two.
- Start with the familiar possession pattern 你有 and a book phrase. The unknown information is the quantity, so put 几 before 本书.
- To answer, change the subject to 我 and replace 几 with 两. Keep 本 because the noun still refers to books.
- Reconstruct both messages without the model. If the amount changes to twenty, the number becomes 二十, while the classifier and noun remain 本书.
Compare your reasoning
你有几本书？我有两本书。
Keep counting separate from age and clock time
Measure word patterns are common, but not every expression containing a number has the same structure. Age commonly uses a number followed directly by 岁, and clock time uses number expressions with units such as 点. At two o’clock, 两点 is the ordinary form. A negative possession statement uses 没有 before the noun phrase; you do not need to translate no books as a counted phrase containing zero. Begin by identifying the task: counting objects, stating an age, giving a time, or denying possession. Then use the construction suited to that message rather than inserting 个 automatically.
我二十岁。
Wǒ èrshí suì.
I am twenty years old.
岁 follows the age number directly in this ordinary statement. The phrase does not need 个 between the number and the age unit, nor does it need 是 simply because the English translation includes am.
现在两点。
Xiànzài liǎng diǎn.
It is two o’clock now.
The ordinary expression for two o’clock is 两点. This shows another common environment for 两 beyond the first classifier examples. The sentence gives a time, so its interpretation comes from 点 and the context rather than from a noun naming counted objects.
Notice the difference
Common mistakes
Keep the classifier inside a counted noun phrase
Instead of三书
For this meaning三本书
For three books, the number and noun normally need the classifier 本 between them. The noun does not gain an English plural ending, but that does not mean the whole phrase contains only a number and noun. Learn 本书 as a retrievable pairing, then vary the number. This correction applies to the ordinary counted phrase; labels, lists, and specialized expressions may organize information differently.
Do not replace the tens digit with 两
Instead of两十本书
For this meaning二十本书
Twenty is built with 二十. The preference for 两 before a classifier concerns the simple quantity two, as in 两本书. It does not change the internal form of the larger number twenty. Identify the complete number first, then attach the classifier and noun. Comparing two books with twenty books makes the two environments visible while keeping the object constant.
Choose a unit that matches the intended amount
Instead of两本茶
For this meaning两杯茶
The intended message is two cups of tea, so 杯 supplies the serving unit. 本 does not count cups of a drink in this ordinary context. A classifier is not a disposable sound added only to satisfy a grammar rule; it can express what kind of amount you are requesting. State that amount in English first, then select the corresponding Mandarin unit and noun.
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
Say that you have two books and three photos. Then ask your listener how many books they have.
Compare with a model
我有两本书和三张照片。你有几本书？
I have two books and three photos. How many books do you have?
Build each counted phrase separately before joining them: 两本书 and 三张照片. The nouns select different classifiers, while only the quantity two needs the familiar 两 form. The question keeps 本书 and replaces the known number with 几. Pinyin: Wǒ yǒu liǎng běn shū hé sān zhāng zhàopiàn. Nǐ yǒu jǐ běn shū? After checking the model, change the quantities to twenty books and four photos. Explain why twenty uses 二十 even though two books uses 两.
- 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
Ask for two cups of tea and one bottle of water using a sentence meaning I want these amounts.
Compare with a model
我要两杯茶和一瓶水。
I want two cups of tea and one bottle of water.
The phrase 两杯茶 counts servings of tea, and 一瓶水 counts a bottle of water. The units are part of the intended amounts, so the general classifier 个 would not replace them while preserving the same message. Pinyin with dictionary tones: Wǒ yào liǎng bēi chá hé yī píng shuǐ. In connected speech, 一 before píng commonly changes to a falling tone. Once you can produce the amounts, turn the sentence into a courteous request in context rather than assuming that a bare want statement is equally suitable in every interaction.
- 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: eleven
___
- 十一
- 一十
Check the answer
Answer: 十一
十一: The number is built from ten followed by one. You do not need to insert a separate word corresponding to plus or and. This is a whole number reading, not two independent digits in a code.
一十: This sequence would not be the ordinary beginner form for eleven. 十一 places the ten before the added unit, which is the structure needed for the intended quantity.
Question 2
Complete the sentence for this meaning: twenty three
___
- 两十三
- 二十三
Check the answer
Answer: 二十三
两十三: 两 is common before classifiers for a quantity of two, but it does not replace 二 inside the ordinary number twenty three. Learn compound number formation separately from classifier phrases.
二十三: 二十 supplies two tens and 三 adds three units. The initial 二 is part of a compound number, so it does not become 两 merely because the complete number may later count objects.
Question 3
Complete the sentence for this meaning: two people
___个人
- 两
- 二
Check the answer
Answer: 两
两: The number immediately precedes the classifier 个, so 两 is the usual beginner form. 人 names the people being counted. The classifier organizes the phrase; it is not an English plural ending attached to the noun.
二: 二 is used in counting and compound numbers, but 两 is the ordinary choice for this simple quantity before 个. The distinction does not depend on whether the people are male or female.
Question 4
Complete the sentence for this meaning: twenty people
___十个人
- 两
- 二
Check the answer
Answer: 二
两: 两十 is not the ordinary form for twenty in the pattern taught here. The rule favoring 两 before a classifier applies to a quantity of two, not to the tens digit inside twenty.
二: The number is twenty, whose structure uses 二十. Only after that complete number comes 个 and the noun. Do not let the later classifier change the internal construction of the number itself.
Question 5
Complete the sentence for this meaning: three books
三___书
- 本
- 张
Check the answer
Answer: 本
本: 本 is the conventional classifier for books in this basic phrase. The number precedes it and the noun follows it. The noun itself does not need an added plural ending because the quantity already makes the number explicit.
张: 张 commonly counts flat sheets or photographs. It does not replace 本 for bound books in this ordinary phrase, even though pages inside a book are flat.
Question 6
Complete the sentence for this meaning: four photos
四___照片
- 本
- 张
Check the answer
Answer: 张
本: 本 is useful for books and similar bound items. A photograph in this simple counting context normally uses 张, so choosing 本 changes the expected classifier pairing.
张: 张 is a common classifier for photographs. Learn the number, classifier, and noun as a connected phrase so that the classifier is retrieved with the object instead of added as an afterthought during speech.
Question 7
Complete the sentence for this meaning: two cups of tea
两___茶
- 杯
- 本
Check the answer
Answer: 杯
杯: 杯 supplies the serving unit, and 茶 names the drink. Because the quantity two precedes that unit, 两 is natural here. The phrase counts cupfuls of tea, not two unspecified individual tea objects.
本: 本 counts books in the beginner patterns taught here. It does not supply a serving unit for tea, so the phrase would not communicate the requested two cups.
Question 8
Complete the sentence for this meaning: one bottle of water
一___水
- 张
- 瓶
Check the answer
Answer: 瓶
张: 张 is not the container unit for a bottle of water. The intended quantity is organized by 瓶, so selecting a familiar classifier for flat objects would lose the message.
瓶: 瓶 identifies the container or amount being counted. Our Pinyin keeps the dictionary tone of 一; before the second tone píng it is commonly pronounced with a falling tone in connected speech. Keep the spelling convention separate from the spoken adjustment.
Question 9
Complete the sentence for this meaning: this book
这___书
- 本
- 张
Check the answer
Answer: 本
本: The demonstrative and classifier combine with 书 to make one noun phrase. 本 matches the book noun just as it does in a counted phrase. The phrase can then become the subject or object of a complete sentence.
张: 张 does not replace the book classifier in this ordinary demonstrative phrase. Keeping the correct classifier matters even when a number is absent and the speaker is simply pointing.
Question 10
Complete the sentence for this meaning: that person
那___人
- 本
- 个
Check the answer
Answer: 个
本: 本 is the book classifier in the examples practiced here. It is not the ordinary classifier linking 那 with a person, so it does not preserve the intended noun phrase.
个: 个 is a common classifier for a person in this neutral phrase. The demonstrative identifies which person is meant. Other classifiers can add distinctions such as courtesy, but this lesson gives a useful basic choice without claiming it is the only possible one.
Question 11
Complete the sentence for this meaning: How many books do you have?
你有___本书？
- 几
- 吗
Check the answer
Answer: 几
几: 几 fills the unknown number position before 本书. The possession predicate 有 remains unchanged. Because the quantity word already asks for missing information, the ordinary question does not need an added final 吗.
吗: 吗 asks whether a complete proposition is true. It cannot occupy the number slot before the classifier with the meaning how many, so this question requires 几 instead.
Question 12
Complete the sentence for this meaning: I have two books.
我有___本书。
- 二
- 两
Check the answer
Answer: 两
二: For the simple quantity two immediately before 本, 两 is the usual beginner form. 二 belongs in other number environments, such as counting or the internal structure of twenty.
两: The answer replaces the unknown quantity with 两 before the classifier 本. This preserves the structure of the question while providing the requested number. Notice that the book noun stays the same even though the amount is more than one.
Question 13
Complete the sentence for this meaning: I am twenty years old.
我二十___。
- 岁
- 个岁
Check the answer
Answer: 岁
岁: 岁 follows the age number directly in this ordinary statement. The phrase does not need 个 between the number and the age unit, nor does it need 是 simply because the English translation includes am.
个岁: The basic age expression is number plus 岁. Adding the general classifier 个 here imports the object counting pattern into a different construction and produces the wrong form.
Question 14
Complete the sentence for this meaning: It is two o’clock now.
现在___点。
- 二
- 两
Check the answer
Answer: 两
二: For the clock time two o’clock, 两点 is the usual beginner expression. Do not transfer 二 from counting aloud into every context that English translates with two.
两: The ordinary expression for two o’clock is 两点. This shows another common environment for 两 beyond the first classifier examples. The sentence gives a time, so its interpretation comes from 点 and the context rather than from a noun naming counted objects.
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 1
- 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 2: Talking About Family Members
- Michigan State University, Wenying Zhou: Lesson 3 Dialogue 1: Schedule a Time to Meet
- Michigan State University, Wenying Zhou: Lesson 5 Dialogue 1: What Would You Like to Drink?
- The Open University, Getting Started with Chinese 1: Numbers from 0 to 99
- Michigan State University, Wenying Zhou: Lesson 2 Dialogue 1: Talking About a Photo
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?