Lan đang ho.

Yes. Lan is a Vietnamese given name, and it is very commonly a woman’s name. In this sentence, Lan is simply the subject: the person who is coughing.

Đang marks an action as being in progress. It is often similar to the English be + -ing form.

So in Lan đang ho, đang shows that the coughing is happening now or around now, not just as a general fact.

A useful pattern is:

subject + đang + verb

For example:

• Lan đang học. = Lan is studying.
• Tôi đang ăn. = I am eating.

Vietnamese does not build the progressive the same way English does.

In English, you say is coughing:

• is = auxiliary verb
• coughing = main verb

In Vietnamese, you do not need a separate equivalent of English is here. Instead, Vietnamese uses:

• the subject: Lan
• an aspect marker: đang
• the verb: ho

So the structure is more like:

Lan + ongoing-action marker + cough

That is completely normal Vietnamese grammar.

Yes. Ho is the verb to cough.

Vietnamese verbs do not change form the way English verbs do. So ho stays ho whether the subject is one person, many people, present, past, or future. Time and aspect are usually understood from context or shown with extra words such as đang, đã, or sẽ.

So:

• Lan ho can mean Lan coughs / Lan coughed / Lan is coughing, depending on context.
• Lan đang ho makes the ongoing meaning clear.

The word order is:

Subject + aspect marker + verb

So:

• Lan = subject
• đang = ongoing-action marker
• ho = verb

This is a very common Vietnamese pattern.

Yes, you can. Lan ho is grammatical.

However, without đang, the sentence is less specific. It could mean something like:

• Lan coughs
• Lan is coughing
• Lan coughed

The exact meaning depends on context.

Adding đang helps the speaker clearly show that the action is happening at that moment or during the current period.

A simple negative form is:

Lan không ho.

This means Lan is not coughing or Lan does not cough, depending on context.

In everyday Vietnamese, this is the most natural basic negative form. Learners sometimes try to translate English word-for-word and look for a direct equivalent of is not coughing, but Vietnamese usually handles this more simply with không before the verb.

There are several natural ways. Two common ones are:

• Lan đang ho à?
• Lan đang ho phải không?

The first is a short, conversational question, often used when you notice something and want confirmation.

The second is closer to Lan is coughing, right?

Vietnamese often forms yes/no questions with sentence-final particles or question phrases, rather than changing word order the way English sometimes does.

A rough guide is:

• Lan ≈ lahn
• đang ≈ dahng
• ho ≈ hoh

A few useful notes:

• đ is pronounced like an English d, not like English th
• ng at the end of đang is like the final sound in sing
• all three words here have the plain, level tone

The pronunciation will vary somewhat by region, but this is a good starting point.

Yes, it does. Lan đang ho is short, natural, and completely normal Vietnamese.

It sounds like a straightforward statement describing what Lan is doing right now. Vietnamese often prefers short, clean sentences like this when the context is already clear.