Questions & Answers about Tôi muốn uống nước nữa.
A word-by-word breakdown is:
- Tôi = I
- muốn = want
- uống = drink / to drink
- nước = water
- nữa = more / another / again, depending on context
So the sentence is literally something like:
- I want drink water more
But in natural English, that becomes:
- I want to drink more water
- or I want another drink of water, depending on context.
Vietnamese does not use an infinitive marker like English to in this kind of sentence.
In English:
- I want to drink water.
In Vietnamese:
- Tôi muốn uống nước.
So after muốn (want), you can directly put the verb:
- muốn ăn = want to eat
- muốn đi = want to go
- muốn uống = want to drink
This is very normal Vietnamese grammar.