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Ngữ pháp
Nouns and determiners A1 A2 B1

Articles: a, an, the, and no article

Choose between indefinite, definite, and no article based on shared knowledge, countability, and specificity.

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Tạm thời hiển thị bài học gốc bằng tiếng Anh.
Hướng dẫn trực quan

Articles: open, point, or widen

ARTICLE = listener logic: can they identify it?

Start with the noun:

1) one countable thing (one/two possible)
   ├─ new/not identified  →  a/an opens
   │  I saw a dog.
   └─ known/identified    →  the points
      The dog was barking.

2) many things or uncountable stuff/idea
   ├─ general meaning     →  Ø (no article) widens
   │  I like dogs.
   │  Water is important.
   └─ specific/identified →  the points
      The dogs next door bark at night.
      The water in this bottle is cold.

Use a/an to introduce one countable thing, the when the listener can identify it, and no article for general many/stuff ideas.

Introduction

Articles are listener logic

Articles show how a noun is being introduced to the listener. Use a/an for one singular count noun that is new or not yet identifiable, the for something identifiable, and no article for many general plurals and uncountable nouns. I saw a dog. The dog was barking. I like dogs. Notice that article choice depends on meaning in the sentence, not only on the noun. Dog can take a, the, or no article when the situation changes.
Core Ngữ pháp A1 Từ vựng A1 Neutral

I saw a dog.

A dog is mentioned for the first time, so the listener cannot identify it yet.

Các thành phần cấu tạo

Đọc câu theo từng cụm, không đọc từng từ.

I
subject
The speaker introduces the experience.
saw
verb
A simple past verb introducing a new noun.
a dog
indefinite_noun_phrase
Use a/an when one singular count noun is new or not yet identifiable.
Học như một cụm cố định
Core Ngữ pháp A1 Từ vựng A1 Neutral

The dog was barking.

After the first mention, use the for the same dog.

Các thành phần cấu tạo

Đọc câu theo từng cụm, không đọc từng từ.

The dog
definite_noun_phrase
The noun is now identifiable because it was mentioned before.
Học như một cụm cố định
was barking
verb_phrase
Says what that known dog was doing.
Core Ngữ pháp A1 Từ vựng A1 Neutral

I like dogs.

Dogs means dogs in general, not a specific group.

Các thành phần cấu tạo

Đọc câu theo từng cụm, không đọc từng từ.

I like
subject_verb
A common frame for opinions.
dogs
zero_article_plural
Use no article for a plural noun when speaking generally.
Học như một cụm cố định
Cognitive metaphor

A/an opens, the points, no article widens

Think of articles as a focus tool. A/an opens a new item in the conversation, like placing something on the table. The points to an item already on the table, or one the listener can find from context. No article often widens the view to a whole category or substance. Before choosing, ask three questions: Is the noun countable? Is it singular? Can the listener identify exactly which one or which group?
Core logic

First check countability

Countability is the first gate. A singular count noun normally cannot stand alone; it needs a determiner such as a/an, the, my, this, or one. She is a doctor. Use an before a vowel sound and a before a consonant sound, not simply a vowel letter: I waited an hour. She studies at a university. Plural count nouns and uncountable nouns can appear with no article when they are indefinite or general: We bought furniture.
Core Ngữ pháp A1 Từ vựng A1 Neutral

She is a doctor.

Singular countable job nouns normally need a determiner.

Các thành phần cấu tạo

Đọc câu theo từng cụm, không đọc từng từ.

She
subject
The person being described.
is
linking_verb
Links the subject to a job or role.
a doctor
indefinite_job
Use a/an with singular countable job names.
Học như một cụm cố định
Exception Ngữ pháp A1 Từ vựng A1 Neutral

I waited an hour.

Article choice follows sound, not spelling.

Các thành phần cấu tạo

Đọc câu theo từng cụm, không đọc từng từ.

I waited
subject_verb
A simple frame for time spent.
an hour
an_before_vowel_sound
Use an before a vowel sound; the h is silent in hour.
Học như một cụm cố định
Exception Ngữ pháp A1 Từ vựng A1 Neutral

She studies at a university.

University starts with a vowel letter but a consonant sound, so use a.

Các thành phần cấu tạo

Đọc câu theo từng cụm, không đọc từng từ.

She studies
subject_verb
Introduces an activity.
at a university
place_phrase
Use a before university because it begins with a consonant sound, /y/.
Học như một cụm cố định
Core Ngữ pháp A1 Từ vựng A2 Neutral

We bought furniture.

Furniture is uncountable here, so do not use a.

Các thành phần cấu tạo

Đọc câu theo từng cụm, không đọc từng từ.

We bought
subject_verb
Introduces something obtained.
furniture
zero_article_uncountable
Uncountable nouns can appear with no article when indefinite.
Học như một cụm cố định
Core pattern

Use a/an for first mention

Use a/an when you introduce one member of a larger group and the exact identity is not important or not identifiable to the listener yet. This is common after there is, with jobs, and with descriptions. There’s a café on the corner. The article a does not mean the café is strange or unimportant; it means you are presenting it as one possible café, new to the listener. After this, if you talk about the same café, you usually switch to the.
Core Ngữ pháp A1 Từ vựng A1 Neutral

There’s a café on the corner.

A café is introduced as one café, not yet known to the listener.

Các thành phần cấu tạo

Đọc câu theo từng cụm, không đọc từng từ.

There’s
existence_frame
Introduces that something exists.
a café
indefinite_noun_phrase
Use a/an to introduce one new singular count noun.
Học như một cụm cố định
on the corner
location_phrase
Gives the location.
Core pattern

Use the for identifiable nouns

Use the when the listener can identify the noun. The reason may be a previous mention, the immediate situation, shared local knowledge, or words that limit the noun. The café opens at seven. Where is the station? In these sentences, the listener can connect the noun to a known café or the relevant station. The often answers which one? Use it for specific plural and uncountable nouns too when the group or substance is limited.
Core Ngữ pháp A1 Từ vựng A1 Neutral

The café opens at seven.

The refers back to the café introduced earlier.

Các thành phần cấu tạo

Đọc câu theo từng cụm, không đọc từng từ.

The café
definite_subject
The café is identifiable because it was just mentioned.
Học như một cụm cố định
opens at seven
verb_phrase
Gives information about that known café.
Question Ngữ pháp A1 Từ vựng A1 Neutral

Where is the station?

The station means the relevant or expected station in that place.

Các thành phần cấu tạo

Đọc câu theo từng cụm, không đọc từng từ.

Where is
question_frame
Asks for a location.
the station
definite_place
Use the when the relevant place is identifiable from context.
Học như một cụm cố định
Contrast

No article vs the

No article is the main contrast with the for plural count nouns and uncountable nouns. Use no article for a whole category, activity, or substance in general: Dogs are friendly. Water is important. Use the when you limit that category or substance to a known set: The dogs next door bark at night. The water in this bottle is cold. This contrast is especially important after verbs such as like, hate, need, and study.
Core Ngữ pháp A1 Từ vựng A1 Neutral

Dogs are friendly.

This means dogs as a category.

Các thành phần cấu tạo

Đọc câu theo từng cụm, không đọc từng từ.

Dogs
zero_article_plural
Use no article for a plural noun in general meaning.
Học như một cụm cố định
are friendly
description
Gives a general opinion.
Contrast Ngữ pháp A2 Từ vựng A1 Neutral

The dogs next door bark at night.

This is not about all dogs; it is about a known group of dogs.

Các thành phần cấu tạo

Đọc câu theo từng cụm, không đọc từng từ.

The dogs next door
definite_plural
The group is limited and identifiable.
Học như một cụm cố định
bark at night
verb_phrase
Says what that specific group does.
Core Ngữ pháp A1 Từ vựng A1 Neutral

Water is important.

Water means water generally, not a specific amount.

Các thành phần cấu tạo

Đọc câu theo từng cụm, không đọc từng từ.

Water
zero_article_uncountable
Use no article for an uncountable noun in general meaning.
Học như một cụm cố định
is important
description
Gives a general fact.
Contrast Ngữ pháp A2 Từ vựng A1 Neutral

The water in this bottle is cold.

The is used because the water is limited by in this bottle.

Các thành phần cấu tạo

Đọc câu theo từng cụm, không đọc từng từ.

The water in this bottle
definite_uncountable
The phrase limits the uncountable noun to a specific amount.
Học như một cụm cố định
is cold
description
Describes that specific water.
Usage rules

Questions and negatives

Questions and negatives keep the same article logic. A question can ask for any one item, or for an identifiable item. Is there a pharmacy near here? asks for any pharmacy in the area. A negative also keeps the noun type clear: I don’t have a car. means no car in my situation, not no specific car. Useful frames are Is there a/an + singular count noun?, Where is the + place?, and I don’t have a/an + singular count noun.
Question Ngữ pháp A1 Từ vựng A2 Neutral

Is there a pharmacy near here?

The speaker asks for any pharmacy, not a known pharmacy.

Các thành phần cấu tạo

Đọc câu theo từng cụm, không đọc từng từ.

Is there
question_frame
Asks whether something exists nearby.
a pharmacy
indefinite_place
Use a/an when any one example is acceptable.
Học như một cụm cố định
near here
location_phrase
Limits the search area.
Negative Ngữ pháp A1 Từ vựng A1 Neutral

I don’t have a car.

Negatives do not remove the need for a/an with singular count nouns.

Các thành phần cấu tạo

Đọc câu theo từng cụm, không đọc từng từ.

I don’t have
negative_frame
A common negative possession frame.
a car
indefinite_noun_phrase
A singular count noun still needs a determiner in a negative sentence.
Học như một cụm cố định
Danger zone

Common article traps

Two traps cause many article errors. First, do not leave a singular count noun bare. Mistake: I bought new phone. Correct: I bought a new phone. Second, do not use the for a general plural or uncountable noun just because your language would. Mistake for a general meaning: I like the music. Correct: I like music. But the is correct when the music is specific, for example at a party. Most personal names, city names, languages, and school subjects also use no article.
Mistake Ngữ pháp A1 Từ vựng A1 Neutral

I bought new phone.

Phone is a singular count noun, so it needs a determiner.

Corrected Ngữ pháp A1 Từ vựng A1 Neutral

I bought a new phone.

A new phone is the correct singular count noun phrase.

Các thành phần cấu tạo

Đọc câu theo từng cụm, không đọc từng từ.

I bought
subject_verb
The action frame.
a new phone
indefinite_noun_phrase
Use a/an before a new singular count noun.
Học như một cụm cố định
Mistake Ngữ pháp A1 Từ vựng A1 Neutral

I like the music.

This is only a mistake when the speaker means music in general.

Corrected Ngữ pháp A1 Từ vựng A1 Neutral

I like music.

Music means music generally, so no article is used.

Các thành phần cấu tạo

Đọc câu theo từng cụm, không đọc từng từ.

I like
opinion_frame
Introduces a general preference.
music
zero_article_uncountable
Use no article for an uncountable noun in general meaning.
Học như một cụm cố định
Summary

The practical decision path

Choose articles in this order. First, decide whether the noun is singular count, plural count, or uncountable. If it is singular count, give it a determiner. Next, decide whether the listener can identify the noun. If not, a/an is usually right for a singular count noun. If yes, use the. For plural count and uncountable nouns, use no article for general or indefinite meaning, and the for specific, limited, or shared meaning. Article choice is shared-knowledge logic.
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