Bác sĩ kiểm tra da.

Vietnamese basic word order is usually Subject + Verb + Object, just like English.

So in Bác sĩ kiểm tra da:

• Bác sĩ = the subject
• kiểm tra = the verb
• da = the object

That gives:

• doctor + examine/check + skin

If you moved da before the verb, it would no longer follow the normal sentence pattern.

It can mean either, depending on context. Vietnamese often does not use articles like a or the.

So Bác sĩ kiểm tra da could be understood as:

• The doctor examines the skin
• A doctor examines skin
• The doctor checks skin

In real life, context tells you which one is meant.

Vietnamese often leaves out words that English requires.

In this sentence:

• there is no article like a or the
• there is no helping verb like is
• the sentence still works perfectly

Vietnamese is more compact here. English needs extra grammar words, but Vietnamese often does not.

Kiểm tra means to check, to inspect, or to examine.

In a medical context, it often means:

• examine
• check
• inspect

So with bác sĩ, it sounds natural as:

• The doctor examines the skin
• The doctor checks the skin

Usually da means skin in everyday usage, especially in a sentence like this.

However, depending on context, da can also refer to leather. For example:

• áo da = leather jacket

But in Bác sĩ kiểm tra da, the medical context makes skin the natural meaning.

By itself, it is somewhat general or context-dependent.

Da has no marker here showing:

• whose skin it is
• whether it is one patch of skin or skin in general
• whether it is the skin or just skin

In conversation, the surrounding context usually makes this clear. If needed, Vietnamese could be more specific, for example by adding a person or body part relationship.

This sentence has no explicit tense marker.

Vietnamese often leaves tense unstated unless it is important. So Bác sĩ kiểm tra da could mean:

• The doctor examines the skin
• The doctor is examining the skin
• The doctor examined the skin
• The doctor will examine the skin

The time usually comes from context, or from extra words such as:

• đã = past
• đang = ongoing
• sẽ = future

For example:

• Bác sĩ đang kiểm tra da. = The doctor is examining the skin.
• Bác sĩ đã kiểm tra da. = The doctor examined the skin.

Each syllable in Vietnamese has its own tone:

• bác: rising tone
• sĩ: creaky broken rising tone
• kiểm: dipping tone
• tra: level tone
• da: level tone

A learner should pay special attention to:

• sĩ, because the ngã tone can be tricky
• kiểm, because the hỏi tone is also difficult for many English speakers

Since Vietnamese is tonal, saying the wrong tone can make the word sound like a different word.

It can be both.

It is a noun meaning doctor, but it can also be used as a form of address, similar to Doctor in English.

So:

• Bác sĩ kiểm tra da. = The doctor examines the skin.

And in direct address, you might also hear:

• Bác sĩ ơi... = Doctor...

This depends on context, but yes, bác sĩ can function in both ways.

Both are possible.

Da by itself is perfectly grammatical and natural, especially in a short textbook sentence.

But in more natural real-world speech, people might also say things like:

• da của bệnh nhân = the patient’s skin
• vùng da này = this area of skin
• làn da = complexion/skin, often in beauty or descriptive contexts

So da is fine here, but real speech may add more detail if needed.

Yes, it is completely fine as a full sentence.

It has everything needed:

• a subject: Bác sĩ
• a verb: kiểm tra
• an object: da

Vietnamese often allows very short, efficient sentences. What feels a little bare in English can still be fully natural and grammatical in Vietnamese.