係 (to be) in Cantonese

Overview

The verb 係 hai6 is the Cantonese copula, equivalent to English "to be" when used for identification and classification. It is one of the first and most essential verbs to learn at the CEFR A1 level, appearing in virtually every basic conversation.

Unlike English "to be," 係 hai6 does not conjugate -- it remains the same regardless of subject, tense, or number. It is negated with 唔 m4 to form 唔係 m4 hai6 (is not). Importantly, 係 hai6 is distinct from the Mandarin equivalent 是 shi -- the pronunciation is completely different.

Note that Cantonese adjectives typically do not require a copula. You say 佢好靚 (she is very pretty) without 係. The verb 係 is specifically used for equating or classifying nouns: "A is B."

How It Works

Basic Pattern: A 係 B

The structure is straightforward: Subject + 係 + Noun/Noun Phrase.

Pattern	Structure	Use
Affirmative	A + 係 + B	A is B
Negative	A + 唔係 + B	A is not B
A-not-A question	A + 係唔係 + B?	Is A B?

When to Use 係

• Identification: 我係Peter。(I am Peter.)
• Classification: 佢係醫生。(He is a doctor.)
• Equation: 呢個係我嘅。(This is mine.)

When NOT to Use 係

• With adjectives: 佢好高。(He is tall.) -- no 係 needed
• For location: 佢喺學校。(He is at school.) -- use 喺 hai2 instead

Examples in Context

Cantonese	Jyutping	English	Note
我係學生。	ngo5 hai6 hok6 saang1	I am a student.	basic identification
佢唔係老師。	keoi5 m4 hai6 lou5 si1	He/She is not a teacher.	negation with 唔
呢個係咩嚟㗎？	ni1 go3 hai6 me1 lai4 gaa3?	What is this?	with sentence-final particles
係唔係你嘅？	hai6 m4 hai6 nei5 ge3?	Is it yours?	A-not-A question
我哋係朋友。	ngo5 dei6 hai6 pang4 jau5	We are friends.	plural subject
佢係我嘅同事。	keoi5 hai6 ngo5 ge3 tung4 si6	He/She is my colleague.	with possessive
呢度係香港。	ni1 dou6 hai6 hoeng1 gong2	This is Hong Kong.	place identification
唔係我做嘅。	m4 hai6 ngo5 zou6 ge3	It wasn't me who did it.	emphatic negation
你係邊個？	nei5 hai6 bin1 go3?	Who are you?	with question word
係呀。	hai6 aa3	Yes, that's right.	affirmative response

Common Mistakes

Using 係 with Adjectives

• Wrong: 佢係高。(He is tall.)
• Right: 佢好高。(He is tall.) -- use 好 + adjective, no copula
• Why: Cantonese adjectives are stative verbs and do not need a copula. Adding 係 creates an ungrammatical sentence.

Confusing 係 hai6 with 喺 hai2

• Wrong: 佢係學校。(He is school.)
• Right: 佢喺學校。(He is at school.) -- use 喺 for location
• Why: 係 (tone 6) means "to be (equals)" while 喺 (tone 2) means "to be at/in." Different tones, different meanings.

Forgetting Negation Pattern

• Wrong: 佢不係學生。(Using Mandarin 不)
• Right: 佢唔係學生。(He is not a student.)
• Why: Cantonese uses 唔 m4 for negation, not Mandarin 不.

Responding to 係唔係 Questions

When someone asks a 係唔係 question, you can respond concisely:

Response	Meaning	Example
係	Yes	係，我係學生。(Yes, I am a student.)
唔係	No	唔係，我唔係學生。(No, I am not a student.)
係呀	Yes (softened)	係呀，佢係我朋友。(Yeah, he's my friend.)

係 as Emphasis

In certain constructions, 係 can add emphasis or create a cleft-like structure. For example, 係我做嘅 (it was I who did it) uses 係 to highlight the doer. At the A1 level, you do not need to produce these forms, but recognizing them helps comprehension.

Usage Notes

The A-not-A question pattern (係唔係) is one of the most common ways to form yes/no questions in Cantonese. It literally presents both the positive and negative options. The answer is typically 係 (yes) or 唔係 (no).

In casual speech, 係 can also function as a discourse marker meaning "yes" or "right," similar to English "yeah" or "that's right." You will hear 係 repeated in conversations as a backchannel signal, much like how English speakers say "right, right" or "uh-huh."

The distinction between 係 hai6 (copula, tone 6) and 喺 hai2 (locative, tone 2) is one of the most important tonal minimal pairs in Cantonese. Despite sounding similar to untrained ears, these are completely different words with different functions. Native speakers never confuse them, and mastering this distinction is a key milestone for learners.

Practice Tips

• Drill the A-not-A pattern: Practice asking 係唔係 questions about everything around you: 呢個係唔係你嘅？(Is this yours?) 佢係唔係老師？(Is he/she a teacher?)
• Contrast with adjective sentences: Practice pairs like 佢係醫生 (He is a doctor) vs 佢好叻 (He is smart) to internalize when to use and omit 係. Create ten pairs of each type.
• Listen for the tone difference: Train your ear to distinguish 係 hai6 (tone 6) from 喺 hai2 (tone 2) in natural speech. Record yourself saying both and compare.
• Self-introduction drill: Practice introducing yourself and others using 係: 我係[name]，我係[nationality]人，我係[occupation]。

Related Concepts

• Prerequisite: Personal Pronouns — the subjects you will use with 係
• Next steps: 喺 (at/in/on) — the locative verb often confused with 係