係 (to be) in Cantonese

In Brief

Use 係 (hai6) to identify or classify someone or something: 我係學生 means “I am a student.” The form never changes; put 唔 before it for 唔係 “is not,” and use 係唔係 or the common contraction 係咪 for “is it?” Do not automatically use 係 everywhere English uses “am,” “is,” or “are”: location uses 喺 (hai2), while ordinary adjectives can form the predicate by themselves.

Overview

係 (hai6) is a copula (a linking verb that connects one thing with its identity or category). It joins the topic of a sentence to a noun or noun-like expression: a person can be 學生 “a student,” an object can be 禮物 “a gift,” and a day can be 星期一 “Monday.” This makes 係 essential for introductions, occupations, relationships, ownership checks, and identifying unfamiliar things.

This is an A1 grammar point, and its beginner rule is straightforward: put 係 between the person or thing being discussed and what that person or thing is. Unlike English “be,” 係 has no separate forms corresponding to “am,” “is,” “are,” “was,” or “were.” Cantonese verbs do not change to match the speaker, the number of people, or the time.

The English translation can nevertheless be misleading. English uses “be” for identity, location, and descriptions such as “tall” or “busy.” Cantonese handles those meanings with different sentence patterns. Learning the boundary around 係 is therefore just as important as learning 係 itself.

How It Works

The basic identity pattern

The core structure is:

A + 係 + B

Here, A is the subject (the person or thing being discussed), and B identifies or classifies it. B is commonly a noun phrase (a noun together with words that specify it), such as “my friend” or “a Hong Kong company.”

Purpose	Pattern	Example	Meaning
Identify	A + 係 + B	呢個係我杯茶。	This is my cup of tea.
Classify	A + 係 + category	佢係醫生。	He/She is a doctor.
State a relationship	A + 係 + person/relationship	阿明係我同事。	Ah Ming is my colleague.
Equate	A + 係 + B	今日係星期一。	Today is Monday.

Cantonese does not require an article matching English “a” in 我係學生. Do not insert 一個 simply because English says “a student.” Classifiers such as 個 have their own uses, but they are not indefinite articles that must accompany every occupation or category.

One form for every person and time

The pronunciation and form stay 係 hai6 after every pronoun:

Subject	Example	English
我 ngo5 “I”	我係學生。	I am a student.
你 nei5 “you”	你係新同事。	You are the new colleague.
佢 keoi5 “he/she/it”	佢係老師。	He/She is a teacher.
我哋 ngo5 dei6 “we”	我哋係朋友。	We are friends.
你哋 nei5 dei6 “you all”	你哋係客人。	You are guests.
佢哋 keoi5 dei6 “they”	佢哋係香港人。	They are Hongkongers.

Time normally comes from context or a time expression. Compare 以前佢係老師 “He/She used to be a teacher” and 聽日佢就係經理 “Tomorrow he/she will be the manager.” The verb itself still does not change. At beginner level, focus first on present-time identification; the time examples simply show why you should not search for a past-tense form of 係.

Negation with 唔係

Put 唔 (m4, “not”) directly before 係:

A + 唔係 + B

• 我唔係學生。 — I am not a student.
• 佢唔係我老師。 — He/She is not my teacher.
• 呢個唔係我嘅。 — This is not mine.

The negative unit 唔係 (m4 hai6) stays the same with every subject. In this basic identity pattern, do not remove 係 and leave 唔 before the noun: 我唔學生 is not a grammatical way to say “I am not a student.”

Yes/no questions: 係唔係 and 係咪

A very common Cantonese question pattern repeats the verb around 唔:

A + 係唔係 + B？

• 你係唔係新同事？ — Are you the new colleague?
• 呢度係唔係出口？ — Is this the exit?

In everyday speech, 係唔係 is frequently contracted to 係咪 (hai6 mai6):

• 你係咪新同事？ — Are you the new colleague?
• 呢個係咪你嘅？ — Is this yours?

Both patterns are useful. 係咪 is especially natural in conversation; the full 係唔係 makes the A-not-A structure easier for a learner to see. A short answer normally repeats the relevant positive or negative form:

• 係。 — Yes; it is.
• 唔係。 — No; it is not.

These answers respond to an identity question. Cantonese does not use one universal word equivalent to English “yes” for every possible question; the verb is often repeated instead.

Questions with 咩 and 邊個

Question words usually remain where the missing information belongs rather than moving to the front as they often do in English:

• 佢係邊個？ — Who is he/she?
• 你係邊個部門嘅？ — Which department are you from/in?
• 呢個係咩？ — What is this?

A particularly natural way to ask what an unfamiliar object is uses 嚟㗎:

• 呢個係咩嚟㗎？ (ni1 go3 hai6 me1 lai4 gaa3?) — What is this?

Treat this as a useful whole expression at first. The ending makes the question sound conversational and asks for an explanation or identification; it should not be translated word by word as another form of English “be.”

Where English “be” does not become 係

This contrast is the main checkpoint for English-speaking learners:

Meaning	Cantonese pattern	Example	Not this
Identity or category	係 hai6	佢係老師。 “She is a teacher.”	—
Location	喺 hai2 + place	佢喺學校。 “She is at school.”	佢係學校。
Description with an adjective	usually adjective predicate	佢好高。 “She is tall.”	佢係高。
Possession/existence	有 jau5	我有時間。 “I have time.”	我係有時間。 (neutral beginner meaning)

An adjective predicate means that a describing word forms the central statement without a separate “is.” In 今日好凍 “It is cold today,” 凍 is the description, and no 係 is needed. 好 often helps make a neutral description; in this position it may function more like a natural linking degree word than strongly mean “very.” Bare adjectives are possible in the right contrastive context, but 佢高 can sound contrastive or incomplete to a beginner’s ear.

The two characters 係 and 喺 sound similar but have different tones and jobs:

• 係 hai6 (tone 6): identity — “be; equal to.”
• 喺 hai2 (tone 2): location — “be at/in/on.”

If you know Mandarin, do not pronounce Cantonese 係 as Mandarin 是 shì. In standard written Mandarin, 是 is the usual copula; conversational written Cantonese uses 係 and pronounces it hai6.

Examples in Context

Cantonese	Jyutping	English	Note
我係學生。	ngo5 hai6 hok6 saang1.	I am a student.	Classification
佢唔係老師。	keoi5 m4 hai6 lou5 si1.	He/She is not a teacher.	Negative with 唔係
阿欣係我朋友。	aa3 jan1 hai6 ngo5 pang4 jau5.	Ah Yan is my friend.	Relationship
我哋係香港人。	ngo5 dei6 hai6 hoeng1 gong2 jan4.	We are Hongkongers.	Same 係 with a plural subject
今日係星期五。	gam1 jat6 hai6 sing1 kei4 ng5.	Today is Friday.	Equating a day with its name
呢本係廣東話字典。	ni1 bun2 hai6 gwong2 dung1 waa2 zi6 din2.	This is a Cantonese dictionary.	本 is the classifier for a book
呢個係我嘅。	ni1 go3 hai6 ngo5 ge3.	This one is mine.	The possessed noun is understood
係唔係你嘅？	hai6 m4 hai6 nei5 ge3?	Is it yours?	The subject is omitted because the context supplies it
你係咪新嚟㗎？	nei5 hai6 mai6 san1 lai4 gaa3?	Are you new here?	Conversational 係咪 question
佢係邊個？	keoi5 hai6 bin1 go3?	Who is he/she?	Question word stays after 係
呢個係咩嚟㗎？	ni1 go3 hai6 me1 lai4 gaa3?	What is this?	Natural request for identification
我唔係香港人，我係加拿大人。	ngo5 m4 hai6 hoeng1 gong2 jan4, ngo5 hai6 gaa1 naa4 daai6 jan4.	I’m not from Hong Kong; I’m Canadian.	Negative followed by correction
佢係醫生，但係今日唔喺診所。	keoi5 hai6 ji1 sang1, daan6 hai6 gam1 jat6 m4 hai2 can2 so2.	She is a doctor, but she is not at the clinic today.	Contrasts identity 係 with location 喺
呢杯茶好熱。	ni1 bui1 caa4 hou2 jit6.	This tea is hot.	An adjective sentence needs no 係

Common Mistakes

Using 係 for location

• Wrong: 我係屋企。
• Right: 我喺屋企。 (ngo5 hai2 uk1 kei2)
• Why: “At home” states a location, so use 喺 hai2, not identity 係 hai6. Compare 呢度係我屋企 “This place is my home,” where two things are being identified as the same.

Putting 係 before an ordinary adjective

• Wrong: 今日係好熱。
• Right: 今日好熱。 (gam1 jat6 hou2 jit6)
• Why: Cantonese describing words such as 熱 “hot,” 高 “tall,” and 忙 “busy” can act as the predicate without a copula. English requires “is,” but Cantonese does not copy that structure.

Changing 係 to match the subject

• Wrong idea: searching for different Cantonese forms for “am,” “is,” and “are.”
• Right: 我係、你係、佢係、我哋係.
• Why: 係 never conjugates for person or number.

Negating the noun instead of the copula

• Wrong: 佢唔老師。
• Right: 佢唔係老師。 (keoi5 m4 hai6 lou5 si1)
• Why: In an identity sentence, 唔 negates 係, producing the fixed sequence 唔係.

Treating 係 and 喺 as interchangeable spellings

• Wrong: writing 你係邊度？ when asking someone’s location.
• Right: 你喺邊度？ (nei5 hai2 bin1 dou6?) — “Where are you?”
• Why: They differ in character, tone, and meaning. 你係邊個？ asks “Who are you?”; 你喺邊度？ asks “Where are you?”

Adding 一個 wherever English has “a”

• Less natural as a neutral introduction: 我係一個學生。
• Usually natural: 我係學生。
• Why: English “a” does not require a matching word in a simple Cantonese occupation or category statement. 一個 is possible when the number or individuality matters, but it is not automatically needed.

Usage Notes

In informal conversation, a known subject is often left out. If someone points to a bag, 係唔係你嘅？ is complete and natural: “Is it yours?” Context tells listeners what “it” refers to. English normally requires an explicit subject, so this omission may initially feel surprising.

Sentence-final particles help Cantonese speakers shape attitude and conversational force. Forms such as 㗎 gaa3, 呀 aa3, and 咩 me1 can make an identification sound explanatory, open, or doubtful. They do not alter the core identity rule. Beginners can first learn complete expressions such as 呢個係咩嚟㗎？ and add a fuller particle system later.

In ordinary spoken Cantonese, 係咪 is extremely common. 係唔係 is also correct and useful, especially when speaking deliberately or when highlighting the positive-versus-negative alternatives. Romanization is a pronunciation aid, not a replacement for the characters: pay particular attention to the low falling/low level tone written as 6 in hai6, versus the rising tone 2 in hai2.

Beyond the Basics / Advanced Use

You do not need to produce the following patterns at A1, but you will meet them later.

係…嘅 for focus and explanation

Cantonese can use 係…嘅 to focus a particular detail or present information as an explanation. Compare a plain statement with a focused one:

• 我尋日買咗呢本書。 — I bought this book yesterday.
• 我係尋日買呢本書嘅。 — It was yesterday that I bought this book.

In the second sentence, 係 does more than simply link two nouns. The larger frame highlights 尋日 “yesterday.” Its word order and aspect choices deserve separate study; do not build every beginner sentence with this pattern merely because you see 係 and 嘅 together.

Contrastive 係 before predicates

Although the neutral adjective sentence does not use 係, advanced or strongly contrastive speech can place 係 before a predicate, often with 但係 “but,” 不過 “however,” or a following qualification:

• 貴係貴，但係好襟用。 — It is expensive, true, but it is durable.

This construction concedes or emphasizes that a description is indeed true. It does not invalidate the beginner rule that neutral “It is expensive” is 好貴, not 係貴.

係 as emphasis or confirmation

Speakers may stress 係 to insist that something really is the case, and 唔係 can also function conversationally as “no,” “that’s not it,” or the beginning of a correction. Tone of voice and particles carry much of the nuance. Learn the literal identity use first, then notice how real conversations extend it to agreement, denial, and correction.

Identity across time

Since 係 has no tense forms, time expressions and context locate an identity in time:

• 佢以前係記者。 — He/She used to be a journalist.
• 下個月佢就係部門主管喇。 — Next month he/she will be the department head.

The adverbs and final particle, rather than a changed form of 係, guide the time interpretation. This is a broader Cantonese principle: tense is not marked through verb conjugation in the English way.

Practice Tips

1. Sort English “be” sentences by meaning. Take ten short sentences and label each as identity, location, or description. Translate identity with 係, location with 喺, and descriptions with an adjective predicate. This prevents word-for-word use of 係.
2. Drill four related forms together. For each new noun, say a statement, a negative, a question, and a short answer: 呢個係出口。呢個唔係出口。呢個係咪出口？係。
3. Train the tone contrast aloud. Alternate 係 hai6 and 喺 hai2 in meaningful pairs: 佢係老師 “She is a teacher” versus 佢喺學校 “She is at school.” Record yourself and check that tone 6 and tone 2 do not merge.

Related Concepts

• Prerequisite: Personal Pronouns — supplies subjects such as 我, 你, 佢, and their plural forms.
• Next step: 喺 (at/in/on) — teaches the location word that English speakers often confuse with 係.