Tôi đã sống ở đây lâu.

A word-by-word breakdown is:

• Tôi = I
• đã = a marker often used for a past or realized situation
• sống = live
• ở đây = here
• lâu = for a long time / long

So the structure is roughly:

• Tôi
  • đã sống
    • ở đây
      • lâu

Vietnamese does not always match English word-for-word, so lâu at the end gives the idea of for a long time.

đã often marks that something is in the past or has already happened.

In this sentence, it helps show that the living situation is not just a general fact, but something that has been true up to a point in time. Depending on context, it can feel similar to English:

• I lived here for a long time
• I have lived here here for a long time

The important thing is that đã is not a perfect one-to-one match for any single English tense. It is an aspect/time marker, not a full tense system like English has.

Vietnamese often does not need a separate word that matches English for in duration expressions.

Here, lâu already gives the meaning of a long time or for a long time. So:

• ở đây lâu = here for a long time

That is very normal in Vietnamese. English needs for, but Vietnamese often expresses duration more directly.

lâu means long in the sense of time, not size.

In this sentence, it means:

• for a long time
• a long time

So sống ở đây lâu means live here for a long time.

A useful contrast:

• lâu = long time
• dài = long in length

So you would use lâu, not dài, for time duration here.

Here, ở introduces the location: at / in.

So:

• ở đây = here
• more literally, at here / in here

In this sentence, the main verb is sống (to live), and ở đây tells you where.

So:

• sống ở đây = live here

Vietnamese word order is often:

• subject + time/aspect marker + verb + place + duration

So in this sentence:

• Tôi = subject
• đã = aspect/time marker
• sống = verb
• ở đây = place
• lâu = duration

English says I have lived here for a long time, but Vietnamese naturally puts lâu at the end.

That final position for duration is very common.

Usually, yes, it often suggests that the situation has lasted a long time and may still be true now.

But Vietnamese depends heavily on context, so it is not completely fixed.

If you want to make it clearer that you still live here now, people often say:

• Tôi sống ở đây lâu rồi.
• Tôi đã sống ở đây được lâu rồi.

If you want to make it clear that you used to live here but do not anymore, context or extra words are usually added, for example:

• Tôi đã sống ở đây lâu, nhưng bây giờ tôi chuyển đi rồi.
  • I lived here for a long time, but now I’ve moved away.

Yes, often you can.

Vietnamese frequently leaves out time markers when the meaning is already clear from context or from other words.

For example:

• Tôi sống ở đây lâu rồi.

This is very natural in everyday speech and often sounds more conversational than Tôi đã sống ở đây lâu.

Without đã, the sentence can sound less specifically tied to the past unless context makes it clear. That is why learners often see Vietnamese as more context-based than English.

In many everyday situations, yes.

• Tôi đã sống ở đây lâu is understandable.
• Tôi sống ở đây lâu rồi often sounds more natural and conversational.

Why?

Because rồi often adds the feeling of already / by now, which works very naturally with long duration.

So:

• Tôi sống ở đây lâu rồi = I’ve lived here a long time already / I’ve been living here a long time

This is a very common spoken Vietnamese pattern.

You can, but the meaning is slightly different.

• sống = to live in the sense of reside
• ở = to stay / be at / be in

So:

• Tôi sống ở đây lâu = I have lived here a long time
• Tôi ở đây lâu = I have been here a long time / I stayed here a long time

Using sống emphasizes living/residing here.
Using ở emphasizes simply being/staying here.

Not always.

Tôi is a neutral, polite, and very useful default word for I, especially for learners. But Vietnamese pronouns depend a lot on age, relationship, and social situation.

Depending on who you are talking to, I might be:

• em
• anh
• chị
• con
• cháu
• mình

So Tôi đã sống ở đây lâu is grammatically fine, but in real life, a native speaker might choose a different pronoun depending on the situation.

No. sống can also mean to be alive or to live in a broader sense.

For example:

• Tôi sống ở Hà Nội. = I live in Hanoi.
• Ông ấy vẫn sống. = He is still alive.

In Tôi đã sống ở đây lâu, because of ở đây (here), the meaning is clearly to live/reside.

Yes. Some common alternatives are:

• Tôi sống ở đây lâu rồi.
• Tôi đã sống ở đây được lâu rồi.
• Tôi ở đây lâu rồi.
  Slightly different nuance: I’ve been here a long time

These are all natural, but they are not exactly identical in tone or nuance.

A good learner takeaway is:

• đã helps mark a past/realized situation
• lâu expresses long duration
• rồi often makes the sentence sound more natural in everyday speech when talking about something that has already lasted a long time