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Ngữ pháp
Nouns and determiners A1 A2 B1

Count and uncount nouns

Treat nouns as countable or uncountable so articles, numbers, quantifiers, and verb agreement work naturally.

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Count and uncount nouns: item or stuff?

Ask first: Can I point to one separate thing?

                    NOUN
                     │
        ┌────────────┴────────────┐
        │                         │
 YES: ITEM                    NO: STUFF / IDEA
 COUNT noun                   UNCOUNT noun
        │                         │
 a/an or number               no direct a/an or plural -s
 plural possible              amount words: some/much
        │                         │
 I bought a chair.            We need furniture.
 The chairs are ready.        This information is useful.
                                  │
                                  ▼
                         Need an exact number?
                         Count a unit, not the noun:
                         She gave me a piece of advice.

Choose item or stuff first; if it is stuff, count a unit of it, not the noun itself.

Introduction

Two ways to treat nouns

English nouns are treated in two practical ways. A count noun names separate units: one chair, two chairs, several chairs. An uncount noun names a mass, material, activity, or idea that English does not normally divide directly: furniture, water, work, advice. This choice controls articles, numbers, quantifiers, plural -s, and the verb. Compare I bought a chair. with We need furniture. The meaning may be similar, but the grammar is different: a chair is one item; furniture is a general category. When you learn a new noun, learn its usual count or uncount behavior with it.
Core Ngữ pháp A1 Từ vựng A1 Neutral

I bought a chair.

Chair is a count noun, so one item is a chair.

Các thành phần cấu tạo

Đọc câu theo từng cụm, không đọc từng từ.

I bought
subject + verb
A simple action frame before the noun phrase.
a chair
singular count noun phrase
One countable item needs a determiner such as a.
Học như một cụm cố định
Contrast Ngữ pháp A1 Từ vựng A1 Neutral

We need furniture.

Furniture refers to items like chairs and tables, but English treats it as uncount in general use.

Các thành phần cấu tạo

Đọc câu theo từng cụm, không đọc từng từ.

We need
subject + verb
A common need/request frame.
furniture
uncount noun phrase
Furniture is usually uncount, so it has no plural -s here.
Học như một cụm cố định
Core logic

The core logic

Count nouns have a singular form and a plural form. A singular count noun normally needs a determiner such as a, the, my, this, or one. A plural count noun can take numbers and plural agreement. Uncount nouns do not normally take a/an, do not normally add plural -s, and usually take singular agreement. The chairs are ready. uses plural count grammar. This information is useful. uses singular grammar because information is uncount. The rule is not about importance or size; it is about whether English is presenting the noun as separate countable units.
Core Ngữ pháp A1 Từ vựng A1 Neutral

The chairs are ready.

Chairs is plural count, so the verb is are.

Các thành phần cấu tạo

Đọc câu theo từng cụm, không đọc từng từ.

The chairs
plural count noun phrase
A plural count noun can take plural -s.
Học như một cụm cố định
are ready
plural verb phrase
Plural count nouns usually take plural agreement.
Cognitive metaphor

Items and material

Think of count nouns as items with natural edges and uncount nouns as material without clear edges. You can count cups, chairs, messages, and questions because each one is a separate unit. You do not directly count water, rice, information, or advice in everyday grammar. To count uncount meaning, put it into a container, measure, or unit word. Could I have two glasses of water? counts the glasses, not the water itself. She gave me a piece of advice. counts one piece, not advice as a plural noun.
Question Ngữ pháp A2 Từ vựng A1 Neutral

Could I have two glasses of water?

Water is uncount, so a container word makes it countable.

Các thành phần cấu tạo

Đọc câu theo từng cụm, không đọc từng từ.

Could I have
polite request frame
A reusable polite request frame.
two glasses of water
unit + uncount noun
The number counts glasses, not water directly.
Học như một cụm cố định
Core Ngữ pháp A2 Từ vựng A2 Neutral

She gave me a piece of advice.

Use a piece of advice for one suggestion.

Các thành phần cấu tạo

Đọc câu theo từng cụm, không đọc từng từ.

She gave me
subject + verb + object
A common giving frame.
a piece of advice
unit + uncount noun
Advice is uncount; piece makes one item of it countable.
Học như một cụm cố định
Core pattern

Reusable noun frames

Use four reusable frames: a/an + singular count noun; number + plural count noun; some/any + uncount noun; unit word + of + uncount noun. These frames help you choose articles and quantifiers before you speak. For count nouns, do not leave a singular noun alone: say a question, this question, or my question. For uncount nouns, do not use a/an directly: use some advice, enough time, or a piece of advice. If you are unsure, a lot of is a safe quantity phrase with both plural count nouns and uncount nouns.
Core Ngữ pháp A1 Từ vựng A1 Neutral

a question

Question is a count noun, so one question needs a determiner.

Các thành phần cấu tạo

Đọc câu theo từng cụm, không đọc từng từ.

a question
count frame
One countable item with a/an.
Học như một cụm cố định
Core Ngữ pháp A1 Từ vựng A2 Neutral

some advice

Advice is usually uncount, so use some advice, not an advice.

Các thành phần cấu tạo

Đọc câu theo từng cụm, không đọc từng từ.

some advice
uncount quantity phrase
Some works naturally with uncount nouns.
Học như một cụm cố định
Sentence xray

Sentence X-ray

Look at one mixed sentence: I need a pen, some paper, and two pieces of advice. I need sets up the request. A pen is singular count, so it uses a. Some paper treats paper as uncount material. Two pieces of advice uses the count noun pieces with a number; advice stays uncount after of. The sentence is natural because each noun has the grammar that matches how English presents it. This X-ray is useful for shopping, studying, office tasks, and asking for help.
Core Ngữ pháp A2 Từ vựng A2 Neutral

I need a pen, some paper, and two pieces of advice.

This sentence mixes singular count, uncount, and unit + uncount patterns.

Các thành phần cấu tạo

Đọc câu theo từng cụm, không đọc từng từ.

I need
need frame
A reusable frame for requesting or stating necessity.
a pen
singular count noun phrase
One countable item with a.
some paper
uncount noun phrase
Paper is treated as uncount material here.
Học như một cụm cố định
two pieces of advice
unit + uncount noun
The number counts pieces; advice stays uncount.
Usage rules

Quantifiers and agreement

Quantifiers must match the noun type. Use many, few, a few, several, and numbers with plural count nouns. Use much, little, a little, and amounts with uncount nouns. A lot of, lots of, some, any, no, and enough work with both count plural and uncount nouns. In negatives, We do not have many chairs. is count, but We do not have much time. is uncount. In questions, Is there any milk? uses any with uncount. With plural count nouns, use are there and a plural noun.
Negative Ngữ pháp A1 Từ vựng A1 Neutral

We do not have many chairs.

Use many with plural count nouns, especially in questions and negatives.

Các thành phần cấu tạo

Đọc câu theo từng cụm, không đọc từng từ.

We do not have
negative possession frame
A reusable negative frame.
many chairs
many + plural count noun
Many is used with plural count nouns.
Học như một cụm cố định
Negative Ngữ pháp A1 Từ vựng A1 Neutral

We do not have much time.

Use much with uncount nouns, especially in questions and negatives.

Các thành phần cấu tạo

Đọc câu theo từng cụm, không đọc từng từ.

We do not have
negative possession frame
A reusable negative frame.
much time
much + uncount noun
Much is used with uncount nouns.
Học như một cụm cố định
Question Ngữ pháp A1 Từ vựng A1 Neutral

Is there any milk?

Milk is uncount here, so the question uses is there.

Các thành phần cấu tạo

Đọc câu theo từng cụm, không đọc từng từ.

Is there
existence question frame
A singular/uncount existence question frame.
any milk
any + uncount noun
Any is common in questions with uncount nouns.
Học như một cụm cố định
Contrast

Commonly confused pairs

The closest confusion is often between an uncount noun and a count noun with similar meaning. Message is count, but information is uncount: There are three messages. not three informations. Job is count, but work is often uncount: I have two jobs. and I have a lot of work. Money is uncount in general, but dollars, coins, pounds, and euros are count units. Luggage, furniture, equipment, homework, news, and advice are usually uncount in general English, even when they refer to several real-world items.
Contrast Ngữ pháp A1 Từ vựng A2 Neutral

There are three messages.

Message is count; information with a similar meaning is uncount.

Các thành phần cấu tạo

Đọc câu theo từng cụm, không đọc từng từ.

There are
existence statement
A plural existence frame.
three messages
number + plural count noun
Message is count, so it can take a number and plural -s.
Học như một cụm cố định
Contrast Ngữ pháp A1 Từ vựng A1 Neutral

I have two jobs.

Job is count; work is often uncount.

Các thành phần cấu tạo

Đọc câu theo từng cụm, không đọc từng từ.

I have
possession frame
A common possession frame.
two jobs
number + plural count noun
Job is count, so it can take a number and plural -s.
Học như một cụm cố định
Contrast Ngữ pháp A1 Từ vựng A1 Neutral

I have a lot of work.

Work is usually uncount when it means tasks or effort in general.

Các thành phần cấu tạo

Đọc câu theo từng cụm, không đọc từng từ.

I have
possession frame
A common possession frame.
a lot of work
quantity phrase with uncount noun
A lot of works with uncount nouns.
Học như một cụm cố định
Form variations

Meaning can change the form

Some nouns can be count or uncount when the meaning changes. Food and drink words often become count nouns for servings: I ordered a coffee. means one cup or serving. Animal words may be count for the animal and uncount for the meat: There is chicken in the soup. Room can mean a countable place or uncount space; paper can mean material or a document/newspaper. You can also count types of an uncount substance with kind/type: three cheeses means three kinds of cheese, not necessarily three individual pieces.
Exception Ngữ pháp A2 Từ vựng A1 Neutral

I ordered a coffee.

Coffee is often uncount as a drink, but countable for servings.

Các thành phần cấu tạo

Đọc câu theo từng cụm, không đọc từng từ.

I ordered
ordering frame
A common restaurant or shopping frame.
a coffee
serving as count noun
A coffee means one cup or serving of coffee.
Học như một cụm cố định
Exception Ngữ pháp A2 Từ vựng A1 Neutral

There is chicken in the soup.

Chicken is uncount here because it means meat, not individual birds.

Các thành phần cấu tạo

Đọc câu theo từng cụm, không đọc từng từ.

There is
existence frame
A singular/uncount existence frame.
chicken in the soup
uncount meat noun phrase
Chicken means meat here, so it is uncount.
Học như một cụm cố định
Danger zone

Danger zone

The most common errors come from forcing uncount nouns into count grammar. Mistake: I need an advice. Corrected: I need some advice. Use a piece of advice if you mean one specific suggestion. Mistake: These informations are useful. Corrected: This information is useful. Use pieces of information when separate facts are important. Also be careful with verb agreement: furniture is, news is, equipment is. For quantity questions, prefer how much money, how much luggage, and how much homework; use how many with count units such as dollars, bags, or assignments.
Mistake Ngữ pháp A1 Từ vựng A2 Neutral

I need an advice.

Advice is uncount, so a/an cannot be used directly with it.

Corrected Ngữ pháp A1 Từ vựng A2 Neutral

I need some advice.

Use some advice for an unspecified amount of advice.

Các thành phần cấu tạo

Đọc câu theo từng cụm, không đọc từng từ.

I need
need frame
A reusable frame for requests and needs.
some advice
some + uncount noun
Some advice is the natural uncount form.
Học như một cụm cố định
Mistake Ngữ pháp A1 Từ vựng A2 Neutral

These informations are useful.

Information is uncount, so it does not normally take plural -s.

Corrected Ngữ pháp A1 Từ vựng A2 Neutral

This information is useful.

Use singular agreement with the uncount noun information.

Các thành phần cấu tạo

Đọc câu theo từng cụm, không đọc từng từ.

This information
uncount noun subject
Information is uncount and takes singular grammar.
Học như một cụm cố định
is useful
singular adjective complement
The verb is agrees with the uncount subject.
Summary

Practical checklist

First ask: is English treating this noun as separate units or as an amount/category? If it is one count unit, use a/an or another determiner. If it is more than one count unit, use plural -s, numbers, many, and plural verb forms. If it is uncount, use no a/an, no plural -s, singular agreement, and quantifiers such as some, much, little, or a lot of. When you need to count uncount meaning, add a unit word: piece, glass, cup, bottle, kilo, kind, or type.
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