Cậu đang cắt hành hả?

Cậu is a Vietnamese pronoun meaning something like you, but it is not neutral in the same way English you is.

In this sentence, cậu is used to address:

• a friend
• someone around your age
• someone you are close to
• often a younger person in casual speech, depending on region and relationship

It sounds informal and friendly. You would not usually use cậu for:

• your boss
• an elderly person
• a stranger in a formal situation

Vietnamese pronouns depend heavily on relationship, age, and social context, so in another situation, you might be bạn, anh, chị, em, etc.

Vietnamese word order here is very similar to English:

• Cậu = subject
• đang = progressive marker
• cắt = cut / cutting
• hành = onion / scallion, depending on context

So the structure is:

Subject + đang + Verb + Object

That makes Cậu đang cắt hành literally something like:

You are cutting onions.

This is one reason Vietnamese sentence structure often feels approachable for English speakers.

Đang marks an action as being in progress, similar to English be + -ing.

So:

• cắt hành = cut onions / cutting onions
• đang cắt hành = be cutting onions / are cutting onions right now

It tells you the action is happening at the moment of speaking, or around that time.

Examples:

• Tôi đang ăn. = I’m eating.
• Cô ấy đang học. = She’s studying.

In your sentence, đang makes it clear the speaker is asking whether the person is in the middle of cutting onions.

Yes, often you can, but the meaning changes slightly.

• Cậu cắt hành hả? can mean You cut onions?, Are you cutting onions?, or You’re cutting onions?, depending on context.
• Cậu đang cắt hành hả? clearly emphasizes that the action is happening right now.

Vietnamese often relies on context, so đang is used when you want to be explicit about an ongoing action.

Hả is a sentence-final particle used to turn the sentence into a casual question, often with a tone like:

• Is that so?
• Really?
• Huh?
• Are you ...?

In this sentence, hả makes it sound like the speaker is checking or reacting to what they think is happening:

Cậu đang cắt hành hả?
= Are you cutting onions?

It is informal and conversational. It can also suggest mild surprise, confirmation-seeking, or a soft, curious tone.

These are all ways to form questions, but they feel different.

• hả: casual, spoken, often checking or reacting
  
  • Cậu đang cắt hành hả?
• à: softer, often confirming something already assumed or just learned
  
  • Cậu đang cắt hành à?
• ư: can sound literary, regional, or slightly more marked depending on context
• không: standard yes/no question marker
  
  • Cậu đang cắt hành không?

For everyday casual speech, hả and à are very common.
Không is straightforward and widely understood, but sometimes sounds a bit more plain or direct.

Yes. Vietnamese has several ways to ask yes/no questions.

A very common textbook pattern is:

• Có ... không?

For example:

• Cậu có đang cắt hành không?

But in natural speech, Vietnamese often uses sentence-final particles instead:

• Cậu đang cắt hành hả?
• Cậu đang cắt hành à?

These are usually more natural in casual conversation.
So yes, this is absolutely a yes/no question.

Not always. Hành can refer to onion-related plants in a broader sense, and the exact meaning depends on context.

It may mean:

• onion
• scallion / green onion / spring onion
• sometimes onion-like seasoning ingredients in cooking contexts

So cắt hành could mean:

• cutting onions
• chopping scallions / green onions

If the meaning is already shown to the learner, then follow that context. But be aware that hành is broader than just one exact English word.

Vietnamese does not work like English in this respect. It does not need a verb like to be to form the progressive the way English does.

English:

• You are cutting onions.

Vietnamese:

• Cậu đang cắt hành.

The meaning of are cutting is expressed by đang + verb, not by a separate verb equivalent to English are.

This is a very common pattern in Vietnamese grammar: meanings expressed by English helper verbs are often shown in other ways, or simply left to context.

Yes, very natural in casual spoken Vietnamese.

It sounds like something you might say when:

• you see someone in the kitchen
• you smell onions
• you want to check what someone is doing
• you are reacting to what you think they are doing

Because of cậu and hả, it feels informal and conversational.
It would fit well between friends, siblings, classmates, or people with a suitable relationship.

Definitely. Vietnamese pronouns change depending on who you are talking to.

Examples:

• Bạn đang cắt hành hả? = talking to a friend, somewhat neutral/casual
• Anh đang cắt hành hả? = talking to an older male
• Chị đang cắt hành hả? = talking to an older female
• Em đang cắt hành hả? = talking to a younger person
• Mày đang cắt hành hả? = very informal, can be rude unless the relationship allows it

So the grammar stays the same, but the pronoun changes according to social relationship.

The tone is usually:

• casual
• curious
• lightly confirming
• possibly a little surprised

It does not usually sound highly formal or stiff.

Depending on intonation, it could feel like:

• Are you cutting onions?
• Oh, you’re cutting onions?
• You’re cutting onions, huh?

So sentence-final particles like hả are important not just for grammar, but also for the speaker’s attitude.

A natural short answer could be:

• Ừ, tớ đang cắt hành. = Yes, I’m cutting onions.
• Ừ. = Yeah.
• Không, tớ không cắt hành. = No, I’m not cutting onions.
• Không, tớ đang cắt tỏi. = No, I’m cutting garlic.

If the speaker used cậu, a matching first-person pronoun is often tớ in friendly speech:

• Cậu ... ? ↔ Tớ ...

That pairing is very common among friends.