Tôi uống ít nước.

The sentence follows normal Vietnamese Subject + Verb + Object/quantity phrase order:

• Tôi = subject
• uống = verb
• ít nước = quantity phrase meaning a small amount of water

So the structure is very close to English I drink little water.

Tôi is a common, neutral way to say I in Vietnamese. It is safe in many situations, especially if you do not know the relationship between speakers.

However, Vietnamese pronouns depend a lot on age, social relationship, and context. In real life, people may use other words instead of tôi, such as:

• mình
• em
• anh
• chị
• con
• cháu

So tôi is correct, but it is not the only possible word for I.

In Vietnamese, quantity words usually come before the noun they modify.

So:

• ít nước = little water
• nhiều nước = much/a lot of water
• một ít nước = a little water

This is different from some structures in English, but it is normal in Vietnamese.

Ít means little, few, or not much/many, depending on the noun.

With nước because water is an uncountable noun, ít means little or not much.

So uống ít nước means drinking a small amount of water. It can sometimes suggest not enough water, depending on context.

This is a very common learner question.

• ít nước = little water, not much water
• một ít nước = a little water, some water

Ít by itself can sound more strongly like the amount is small, and sometimes insufficient.

Một ít is softer and often more neutral. It is often closer to English a little rather than little.

Compare:

• Tôi uống ít nước. = I drink little water. / I do not drink much water.
• Tôi uống một ít nước. = I drink a little water. / I drink some water.

Vietnamese verbs do not change form for tense the way English verbs do.

The verb uống stays the same. Time is usually understood from:

• context
• time words
• aspect markers

So Tôi uống ít nước could mean different things depending on context, though by itself it most naturally sounds like a general fact or habit:

• I drink little water
• I do not drink much water

If you want to make time clearer, you can add words such as:

• hôm qua = yesterday
• bây giờ = now
• ngày mai = tomorrow
• đang = in the process of
• đã = past/completed
• sẽ = future

For example:

• Tôi đang uống ít nước. = I am drinking little water.
• Tôi đã uống ít nước hôm qua. = I drank little water yesterday.

Vietnamese does not use articles the same way English does. There is no direct equivalent that must appear before nouns in sentences like this.

So nước can simply mean water without needing a word like the or some.

If you want to make the amount more specific, Vietnamese often uses:

• quantity words: ít, nhiều, một ít
• containers or measure words: một cốc nước, một chai nước

But in this sentence, just nước is completely normal.

Because nước is a mass noun here, and the sentence is talking about water in a general amount, not as countable units.

Vietnamese classifiers are more important when you count individual things or specify containers/units.

Compare:

• ít nước = little water
• một cốc nước = a glass of water
• hai chai nước = two bottles of water

So no classifier is needed in Tôi uống ít nước.

Yes. Nước can have several meanings depending on context, including:

• water
• country/nation
• sometimes extended meanings in compounds

But in Tôi uống ít nước, the verb uống means to drink, so nước clearly means water or some drinkable liquid.

Yes, it is grammatical and natural.

It most naturally means a general habit or fact: I do not drink much water.

In some contexts, native speakers might also say:

• Tôi không uống nhiều nước. = I do not drink much water.
• Tôi uống không nhiều nước. = I drink not much water.
• Tôi uống một ít nước. = I drink a little water.

So your sentence is correct, but the exact wording may change depending on whether you want to emphasize small amount, insufficient amount, or just not much.

Sometimes, yes.

Vietnamese often drops subjects when they are obvious from context. For example, in conversation, if it is already clear who is speaking, someone might simply say:

• Uống ít nước.

But without context, that could sound incomplete or more like a comment or instruction. The full sentence Tôi uống ít nước is clearer and safer for learners.

A rough pronunciation guide is:

• Tôi ≈ toy
• uống ≈ uohng, with a rising tone
• ít ≈ eet, with a rising tone
• nước ≈ noo-uhk, with a rising tone

A few important tone notes:

• tôi has a level tone
• uống has a sharp rising tone
• ít has a sharp rising tone
• nước also has a rising tone

The exact pronunciation depends on dialect, especially for uống and nước, but the tones are important for being understood.

By itself, it usually means I drink little water or I do not drink much water, especially as a habit or general statement.

If you want I am drinking a little water right now, Vietnamese would more naturally use something like:

• Tôi đang uống một ít nước.

So the original sentence is more likely to be understood as a general statement than an action happening right now.