Cậu rảnh không?

Cậu is a Vietnamese pronoun used for you in certain relationships.

In Cậu rảnh không?, cậu means you, but it is not universal like English you. It is typically used:

• among friends
• between people of similar age
• sometimes in a familiar, casual tone

It can also mean other things in other contexts, such as maternal uncle, so pronouns in Vietnamese always depend on context.

No. Cậu is casual and relationship-dependent.

You would usually use it:

• with friends
• classmates
• people around your age
• someone you are on familiar terms with

You would normally not use cậu:

• with strangers in formal situations
• with older people unless the relationship makes it appropriate
• with superiors in professional contexts

If you want a safer, more neutral version, learners often use bạn:

• Bạn rảnh không?

That sounds more broadly usable, though Vietnamese pronouns are still very context-sensitive.

Rảnh means free, available, or not busy.

In this sentence, it usually means:

• Are you free?
• Are you available?
• Do you have time?

It is often used when asking whether someone can talk, meet, help, or do something.

Examples:

• Mai cậu rảnh không? = Are you free tomorrow?
• Bây giờ cậu rảnh không? = Are you free now?

Vietnamese does not need a verb like English to be in many sentences.

English:

• Are you free?

Vietnamese:

• Cậu rảnh không?
• literally something like You free not?

This is normal Vietnamese grammar. You do not need to add a word equivalent to are here.

Không at the end of the sentence turns it into a yes-no question.

Pattern:

• [statement] + không?

So:

• Cậu rảnh. = You are free.
• Cậu rảnh không? = Are you free?

This is one of the most common ways to ask yes-no questions in Vietnamese.

Yes, Cậu có rảnh không? is also correct and very common.

Both are natural:

• Cậu rảnh không?
• Cậu có rảnh không?

The version with có can sound slightly fuller or smoother in some contexts, but both mean essentially the same thing: Are you free?

Learners should know this common yes-no pattern:

• có ... không

But with adjectives or states like rảnh, Vietnamese also often allows the shorter form without có.

A rough pronunciation guide for English speakers is:

• cậu: somewhat like gow with a falling-glottal quality, but this is only approximate
• rảnh: somewhat like zanh or yanh depending on accent, with a dipping tone
• không: roughly khong, with the kh like a breathy k sound

A few important notes:

• Vietnamese tones matter a lot.
• r is pronounced differently in different regions.
• kh is not the same as plain English k.
• Final spelling does not always behave the way an English speaker expects.

If you want to sound natural, it is best to learn this sentence by listening and repeating whole chunks rather than relying only on English-style phonetics.

It sounds:

• casual
• friendly
• direct
• natural in conversation

It is the kind of thing you might say before inviting someone somewhere, asking for help, or starting a chat.

Depending on tone of voice, it can feel:

• warm and casual
• simple and efficient
• slightly abrupt if the relationship is not close enough

Vietnamese often relies on appropriate pronoun choice to signal the social tone, so cậu already makes the sentence feel informal and familiar.

Common answers include:

If yes:

• Ừ, rảnh. = Yeah, I’m free.
• Có, mình rảnh. = Yes, I’m free.
• Rảnh. Có gì không? = I’m free. What’s up?

If no:

• Không, mình bận rồi. = No, I’m busy already.
• Giờ không rảnh. = Not free right now.
• Để lúc khác nhé. = Another time, okay?

In real conversation, people often answer more naturally with their situation rather than just a plain yes or no.

Yes. A few common alternatives are:

• Bạn rảnh không? = Are you free?
• Cậu có rảnh không? = Are you free?
• Bây giờ cậu rảnh không? = Are you free now?
• Hôm nay cậu rảnh không? = Are you free today?
• Lát nữa cậu rảnh không? = Will you be free in a bit?

These differ mainly in:

• pronoun choice
• whether time is specified
• whether có is included

It often does more than just ask about availability.

Depending on context, Cậu rảnh không? can imply:

• I want to ask you something
• Do you have time to talk?
• Want to hang out if you’re free?
• Can you help me if you’re free?

So even though the literal meaning is about being free, the conversational function is often a lead-in to another request or invitation.