Cỏ dại ở trong vườn.

A simple breakdown is:

• cỏ dại = weed / weeds / wild grass
• ở = to be located at / in
• trong = inside / in
• vườn = garden

So the literal structure is:

• cỏ dại → the thing being talked about
• ở trong vườn → where it is

Very literally, it is something like:

• weeds are located inside the garden

Vietnamese usually does not use articles the way English does.

So cỏ dại can mean:

• weed
• a weed
• the weed
• weeds
• the weeds

Context tells you which one is meant.

If a speaker wants to be more specific, they can add other words, but in a basic sentence like this, Vietnamese often leaves that unstated.

By itself, cỏ dại does not clearly mark singular or plural.

It can refer to:

• weed in general
• weeds in general
• a patch of weeds
• weedy grass

That is very normal in Vietnamese. Number is often understood from context.

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

• một cây cỏ dại = one weed plant
• những cây cỏ dại = weeds
• đám cỏ dại = a patch of weeds

Not here.

In this sentence, cỏ dại is being used in a general way, so no classifier is needed.

Classifiers are more common when you are:

• counting things
• pointing to a specific thing
• talking about one unit or one item

For example:

• một cây cỏ dại = one weed plant
• mấy cây cỏ dại = a few weed plants
• một đám cỏ dại = a patch of weeds

But Cỏ dại ở trong vườn is perfectly natural without any classifier.

ở and trong do slightly different jobs:

• ở marks location, like be at / be in
• trong means inside / in

So ở trong gives the idea of is inside / is in.

Compare:

• ở vườn = at the garden / in the garden
• ở trong vườn = inside the garden
• trong vườn = in the garden, but by itself it is often just a location phrase, not a full sentence

So in a complete sentence, ở trong is very natural.

Not exactly.

ở is used for location, so it is closer to:

• be located
• be at
• be in
• stay
• sometimes live at

It is not the general verb to be for every situation.

For example:

• Cỏ dại ở trong vườn = The weeds are in the garden
• Đó là cỏ dại = That is a weed

In the second sentence, Vietnamese uses là, not ở, because it is identifying something, not giving its location.

Vietnamese usually does not mark tense automatically the way English does.

So this sentence is tense-neutral by itself. In most contexts, people understand it as a present situation:

• the weeds are in the garden

If needed, Vietnamese adds time words or markers such as:

• đã for past-related meaning
• sẽ for future-related meaning
• words like hôm qua, bây giờ, ngày mai

But without those, the time is usually understood from context.

Yes, historically and literally it is:

• cỏ = grass
• dại = wild

So word-for-word it is something like wild grass.

But as a whole, cỏ dại is a very common expression meaning weed(s).

So it is best to learn it as a set phrase, not only as a literal combination.

Yes, and that is often very natural.

There is a small difference in focus:

• Cỏ dại ở trong vườn = The weeds are in the garden
  
  • focus on where the weeds are
• Trong vườn có cỏ dại = There are weeds in the garden
  
  • focus on the existence of weeds in the garden

English uses both patterns too:

• The weeds are in the garden
• There are weeds in the garden

So both Vietnamese sentences are correct, but they highlight slightly different things.

Yes.

Vietnamese is flexible enough that the location can come first, especially when you want to set the scene.

For example:

• Ở trong vườn có cỏ dại
• Trong vườn có cỏ dại

This often sounds very natural when introducing new information.

But Cỏ dại ở trong vườn is also correct. It just starts with the thing being discussed instead of the place.

The tones are:

• cỏ → hỏi tone
• dại → nặng tone
• ở → hỏi tone
• trong → ngang tone
• vườn → huyền tone

A few helpful notes:

• cỏ sounds roughly like co with a dipping tone
• dại has a heavy, short, low tone
• ở has the vowel ơ, which is not exactly an English sound
• vườn is often hard for learners because of the ươ vowel combination
• d in dại is pronounced differently by dialect:
  • in the North, it sounds like z
  • in much of the South, it sounds like y

So depending on accent, dại may sound a bit like:

• Northern: zại
• Southern: yại

Not always.

vườn usually refers to a cultivated outdoor area, so depending on context it can mean:

• garden
• yard with plants
• orchard
• planted area around a house

In a simple learner sentence, garden is the safest translation. But in real life, the exact English word can change with context.