Là (to be) in Vietnamese

In Brief

Use là to connect someone or something with an identity, category, or definition: Tôi là giáo viên means “I am a teacher.” Do not automatically translate every English form of “be” with là: ordinary Vietnamese adjectives work directly as predicates, so “She is tired” is Cô ấy mệt, not Cô ấy là mệt. The form là never changes for person or number.

Overview

English uses “be” in many different jobs: “I am a teacher,” “she is tired,” “they are at home,” and “there is a problem.” Vietnamese divides these jobs among different sentence patterns. Là mainly links a subject to a noun or noun phrase that identifies, classifies, names, or defines it. A noun is a word for a person, thing, place, or idea; a noun phrase is a noun together with words that describe or limit it, such as “a new student.”

This is an essential A1 pattern because it lets you introduce yourself, identify people and objects, state occupations and nationalities, and ask what something is. It is also simpler than English “be” in one important way: Vietnamese verbs do not conjugate, meaning that their form does not change with the subject. You use the same là after tôi (“I”), bạn (“you”), cô ấy (“she”), and plural subjects.

The main challenge is therefore not memorising forms. It is deciding whether the sentence needs là at all. An English speaker’s natural habit is to insert it wherever English uses “am,” “is,” or “are.” In Vietnamese, that produces errors before adjectives and in statements of location.

How It Works

The core pattern: subject + là + identity

The subject is the person or thing the sentence is about. In the basic pattern, là connects that subject to an identity or category.

Pattern	Vietnamese	English
person + là + occupation	Tôi là giáo viên.	I am a teacher.
person + là + nationality/category	Lan là người Việt.	Lan is Vietnamese.
thing + là + category	Đây là sách giáo khoa.	This is a textbook.
term + là + definition	Hà Nội là thủ đô của Việt Nam.	Hanoi is the capital of Vietnam.

Vietnamese has no equivalent of the English indefinite articles “a” and “an.” Consequently, Tôi là giáo viên needs no word between là and giáo viên. A classifier or number may appear when the speaker is counting or presenting a particular object, but it is not required simply because English says “a teacher” or “a book.”

One form for every subject

Subject	Example	Meaning
tôi	Tôi là sinh viên.	I am a student.
bạn	Bạn là sinh viên.	You are a student.
anh ấy / cô ấy	Anh ấy là sinh viên.	He is a student.
chúng tôi	Chúng tôi là sinh viên.	We are students.
họ	Họ là sinh viên.	They are students.

There is no equivalent of the English change from “am” to “is” to “are.” Vietnamese time words and context normally locate a statement in time. When time needs to be explicit, words such as đã (past or completed), đang (ongoing), and sẽ (future) can occur before predicates, though not every combination is equally natural. With identities and roles, đã từng là (“used to be / was once”) and sẽ là (“will be”) are especially useful: Cô ấy đã từng là bác sĩ; Anh ấy sẽ là trưởng nhóm.

Do not use là before ordinary adjectives

An adjective describes a quality, such as “tired,” “hot,” or “beautiful.” In Vietnamese, ordinary adjectives can serve directly as the predicate—the part that says something about the subject. No linking verb is needed.

English structure	Natural Vietnamese	Not the basic Vietnamese pattern
She is tired.	Cô ấy mệt.	Cô ấy là mệt.
It is hot.	Trời nóng.	Trời là nóng.
This room is large.	Phòng này rộng.	Phòng này là rộng.
The coffee is good.	Cà phê ngon.	Cà phê là ngon.

You can make these adjective sentences negative with không: Cô ấy không mệt (“She is not tired”). This is different from negating an identity with không phải (là).

Location and existence use different patterns

English “be” also expresses location, but Vietnamese normally uses ở (“be/stay at” or “located at”):

• Tôi ở Hà Nội. — I am in Hanoi.
• Nhà vệ sinh ở đâu? — Where is the restroom?
• Cuốn sách ở trên bàn. — The book is on the table.

For existence—English “there is/are”—Vietnamese commonly uses có (“exist / there is / have”): Có một quán cà phê gần đây means “There is a café nearby.” Neither pattern calls for là.

Negating identity: không phải (là)

To deny an identity or classification, use không phải (là). Phải here is part of the negative copular pattern; do not read it as its separate meaning “must.”

• Tôi không phải là bác sĩ. — I am not a doctor.
• Đây không phải là vé của tôi. — This is not my ticket.
• Anh ấy không phải người Mỹ. — He is not American.

Both không phải là and không phải occur. Keeping là is clear and useful for beginners; omitting it is also very common before a noun phrase. Do not use bare không là as the default A1 way to say “is not” in an identity statement.

Asking questions

For a yes/no question about identity, frame the statement with có phải ... không?:

• Bạn có phải là sinh viên không? — Are you a student?
• Đây có phải là xe buýt số 8 không? — Is this bus number 8?

In everyday conversation, context and rising intonation can produce shorter questions such as Bạn là sinh viên à? (“You’re a student?”). The particle à marks the utterance as a question or shows confirmation-seeking. The full có phải ... không? pattern is more explicit and is a reliable choice for learners.

To ask for an identity, place the question word where the missing information belongs:

• Anh ấy là ai? — Who is he?
• Đây là gì? — What is this?
• Nghề của bạn là gì? — What is your occupation?

Notice that ai (“who”) and gì (“what”) remain after là. Vietnamese does not move them to the beginning as English often does.

Examples in Context

Vietnamese	English	Note
Tôi là giáo viên.	I am a teacher.	Occupation and identity
Minh là bạn của tôi.	Minh is my friend.	Relationship
Chúng tôi là người Canada.	We are Canadian.	The form là does not change
Đây là sách của Lan.	This is Lan’s book.	Identifying an object
Hôm nay là thứ Hai.	Today is Monday.	Naming the day
Hà Nội là thủ đô của Việt Nam.	Hanoi is the capital of Vietnam.	Definition or unique role
Ai là trưởng nhóm?	Who is the team leader?	The unknown identity follows the question pattern
Cái này là gì?	What is this?	Asking for a name or category
Bạn có phải là sinh viên không?	Are you a student?	Explicit yes/no question
Không, tôi không phải là sinh viên.	No, I am not a student.	Negative identity
Cô ấy mệt.	She is tired.	No là before an ordinary adjective
Món này rất ngon.	This dish is very good.	rất strengthens the adjective; no là
Anh ấy ở nhà.	He is at home.	Location uses ở
Có một vấn đề.	There is a problem.	Existence uses có
Mai sẽ là bác sĩ.	Mai will be a doctor.	Future role with sẽ là

Common Mistakes

Translating every “am,” “is,” or “are” as là

• Wrong: Cô ấy là mệt.
• Right: Cô ấy mệt.
• Why: Mệt (“tired”) is an adjective that can be the predicate by itself. English requires “is”; Vietnamese does not.

Using là for location

• Wrong: Tôi là ở Hà Nội.
• Right: Tôi ở Hà Nội.
• Why: Use ở for where someone or something is. Use là for what or who it is.

Forming a negative with không là

• Wrong: Đây không là sách của tôi.
• Right: Đây không phải là sách của tôi.
• Why: The normal negative identity pattern is không phải (là). By contrast, an adjective takes ordinary không: Sách này không mới (“This book is not new”).

Changing là to match the subject

• Wrong idea: looking for separate Vietnamese forms corresponding to “am,” “is,” and “are.”
• Right: Tôi là..., cô ấy là..., họ là...
• Why: Là does not conjugate for person or number.

Moving the question word as in English

• Wrong: Gì đây là?
• Right: Đây là gì?
• Why: Vietnamese usually leaves the question word in the position occupied by the answer: Đây là sách → Đây là gì?

Adding an English-style article

• Wrong idea: searching for a mandatory word meaning “a” in Tôi là ___ giáo viên.
• Right: Tôi là giáo viên.
• Why: Vietnamese does not use an indefinite article before an occupation simply because English uses “a.”

Usage Notes

Pronouns affect tone, not the form of là

Vietnamese personal pronouns often express age, relationship, and respect. A speaker may call themselves tôi, mình, em, anh, or chị depending on the situation. This choice can change the social tone of an introduction, but là remains unchanged: Em là sinh viên and Tôi là sinh viên have the same grammatical pattern.

Subjects can be omitted when context is clear

Conversational Vietnamese often leaves out information that listeners can recover. In a registration conversation, a short answer such as Là sinh viên (“[I’m] a student”) may be understood from context. Beginners should first master complete patterns such as Tôi là sinh viên; later, natural omission becomes easier to recognise.

Là often sounds unnecessary before a pure description

Compare Cô ấy là người thân thiện (“She is a friendly person”) with Cô ấy thân thiện (“She is friendly”). The first uses là because what follows is the noun phrase người thân thiện (“a friendly person”). The second directly predicates the adjective thân thiện (“friendly”). This contrast gives you a practical test: ask whether the words after “be” name a person or thing as a category, or merely describe a quality.

Beyond the Basics: Focus and Extended Uses

You do not need to produce all of these patterns at A1, but you will meet them later.

Là can mark focus, highlighting the information that matters most rather than merely linking two nouns. In Chính Lan là người gọi cho tôi (“Lan is the one who called me”), chính and là help single out Lan. In speech, là may also introduce an explanation or a strongly focused predicate. These marked constructions explain why advanced Vietnamese does not obey an absolute rule that là can never appear near an adjective. The safe beginner rule remains: in a neutral description, say Cô ấy đẹp, not Cô ấy là đẹp.

Là appears in useful explanatory expressions. For example, nghĩa là means “means,” tức là means “that is / in other words,” and gọi là means “is called.” These belong to the broader skill of defining and explaining:

• “Xin chào” nghĩa là “hello”. — “Xin chào” means “hello.”
• Tức là chúng ta phải đợi. — In other words, we have to wait.
• Món này gọi là phở. — This dish is called phở.

Time can change an identity. Because là itself has no tense form, other words carry the time meaning: Ông ấy đã từng là giáo viên (“He used to be a teacher”), Cô ấy vẫn là giám đốc (“She is still the director”), and Nam sẽ là người hướng dẫn (“Nam will be the guide”). The exact choice depends on meaning, not on a conjugation table.

Finally, real usage sometimes omits là in compact labels, headlines, slogans, and conversational structures. It can also retain or add là for rhythm, contrast, or emphasis. Treat these as discourse choices—the way speakers organise and highlight information—rather than exceptions you must memorise before using the core identity pattern.

Practice Tips

1. Sort English “be” sentences by job. Take ten sentences and label each one identity, quality, location, or existence. Translate with là only for identity/classification; use a direct adjective, ở, or có for the other groups.
2. Build four-way mini-dialogues. Practise a statement, question, yes answer, and no answer: Bạn là sinh viên. Bạn có phải là sinh viên không? Phải, tôi là sinh viên. Không, tôi không phải là sinh viên. Replace sinh viên with occupations and relationships you actually use.
3. Listen for the word after là. In simple learner-level conversations, it is often a noun phrase such as giáo viên, bạn tôi, or thủ đô. Then notice common adjective sentences where English would use “be” but Vietnamese has no là.

Related Concepts

• Prerequisite: Personal Pronouns — choose a natural Vietnamese form for “I,” “you,” “he,” or “she” before building identity sentences.
• Next steps: Defining and Explaining — expand là into patterns such as là gì, nghĩa là, tức là, and gọi là.