Đội này thắng rồi.

In Vietnamese, demonstratives like này (this) usually come after the noun.

• đội này = this team
• Compare English: this team
• Vietnamese order: team this

This is very normal in Vietnamese:

• người này = this person
• nhà này = this house
• cuốn sách này = this book

So Đội này literally follows the Vietnamese pattern team this.

Rồi often shows that something has already happened or is now completed.

So:

• Đội này thắng = This team wins / This team won / This team is victorious
• Đội này thắng rồi = This team has won already / This team already won

In this sentence, rồi adds the sense of completion or already.

A very literal breakdown would be:

• Đội này = this team
• thắng = win
• rồi = already / completed

So the whole sentence feels like: This team has already won.

Yes, often you can, but the nuance changes.

• Đội này thắng.
  More neutral. Depending on context, it can mean This team wins, This team won, or This team is the winner.
• Đội này thắng rồi.
  Stronger sense that the result is already decided or the win has happened.

So rồi is not always required for basic meaning, but it helps show that the event is completed.

Here, thắng is mainly functioning as a verb: to win.

So:

• Đội này thắng rồi = This team has won already

Vietnamese words can sometimes behave flexibly depending on context, so learners may feel that thắng is almost adjective-like in some sentences, but in this example it is best understood as the verb to win.

You can compare:

• đội thắng = the winning team / the team that won

There, thắng helps describe the team, but in Đội này thắng rồi, it is the main action.

Vietnamese does not build tense the same way English does.

English often needs helper verbs like:

• has won
• had won
• will win

Vietnamese usually does not use a verb like has for this. Instead, it relies on:

• context
• time words
• particles such as đã, đang, sẽ, rồi

So thắng rồi can express something like has won without needing a separate word for has.

That is very normal in Vietnamese grammar.

A rough pronunciation guide:

• Đội ≈ like doi with a falling-glottal tone
• này ≈ somewhat like nye with a low falling tone
• thắng ≈ roughly thung/thung-uhng, with the ng sound at the end and a sharp rising/glottal tone
• rồi ≈ roughly zoi in northern Vietnamese, yoi or roi in many southern pronunciations, with a falling tone

A few useful notes:

• đ is not the same as English d. In northern Vietnamese, đ sounds more like English d.
• th is an aspirated t, not the English th in think or this.
• ng at the end is like the sound in English sing.
• Tones matter a lot:
  • đội has the nặng tone
  • này has the huyền tone
  • thắng has the sắc tone
  • rồi has the huyền tone

If you want to sound natural, it is best to learn the full pronunciation from native audio, because tone and vowel quality are hard to capture in English spelling.

No, not naturally.

Thắng rồi suggests the win is already achieved or the result is settled, not that the team is currently in the process of winning.

If you want to say is winning in an ongoing sense, Vietnamese would usually use a different structure, often with context or words like đang:

• Đội này đang thắng. = This team is winning.

So:

• đang thắng = currently winning
• thắng rồi = already won / has won

Both relate to winning, but they are used a bit differently.

• thắng is the common everyday verb to win
• chiến thắng can be a more formal or emphatic word meaning to win or victory

In ordinary conversation about a game or competition, thắng is the most natural choice:

• Đội này thắng rồi.

Using chiến thắng here would sound more formal, dramatic, or literary in many contexts.

Not if you want the same meaning.

• Đội này thắng rồi = This team has already won.
• Đây là đội thắng rồi is not a natural equivalent.

Why?

Because đội này is simply this team, while đây là means this is. Also, đội thắng can mean the winning team, so changing the structure changes the sentence a lot.

If you want to identify the team, you might say:

• Đây là đội này = This is this team.
  But that is usually unnecessary or odd in normal conversation.

So for the intended meaning, Đội này thắng rồi is the correct natural structure.

Yes, very naturally.

Even if the match is not technically over, speakers may say Đội này thắng rồi when the result seems effectively certain.

In that case, rồi does not always mean the game clock has ended. It can mean:

• the outcome is basically decided
• they have it in the bag
• they’ve already won, for all practical purposes

So the sentence can be used both:

• after the team officially wins
• when everyone can already see that they are going to win

Context decides the exact feeling.