Tôi dùng chổi để quét sàn nhà.

Here is a word-by-word breakdown:

• Tôi = I
• dùng = use
• chổi = broom
• để = in order to, to
• quét = sweep
• sàn nhà = floor of the house, floor

So the structure is basically:

• Tôi dùng chổi để quét sàn nhà
• I use a broom to sweep the floor

Vietnamese often builds meaning very directly like this.

Để often introduces purpose. In this sentence, it connects using the broom with the purpose of sweeping the floor.

So:

• dùng chổi = use a broom
• để quét sàn nhà = to sweep the floor

It works a lot like to or in order to in English.

A very literal reading would be:

• I use a broom in order to sweep the floor.

In everyday English, we usually just say I use a broom to sweep the floor, and that matches the Vietnamese well.

Sometimes yes, but it changes the feel a little.

• Tôi dùng chổi để quét sàn nhà = very clear, natural, and explicit about purpose
• Tôi dùng chổi quét sàn nhà = also understandable, but less neatly structured

For learners, using để is a good habit because it makes the sentence easier to parse and sounds natural.

Yes, absolutely. That is also a very natural sentence.

Compare:

• Tôi dùng chổi để quét sàn nhà = I use a broom to sweep the floor
• Tôi quét sàn nhà bằng chổi = I sweep the floor with a broom

The difference is mainly in focus:

• dùng ... để ... emphasizes using something for a purpose
• bằng emphasizes the instrument or means: with a broom

Both are good Vietnamese.

In Vietnamese, classifiers such as cái or cây are often used when you are identifying, counting, or emphasizing a noun.

For example:

• một cái chổi = a broom
• cái chổi này = this broom

But when the noun is used in a more general way, especially after a verb like dùng, the classifier is often dropped:

• dùng chổi = use a broom

You may also hear cây chổi, since cây is used for some long objects, but chổi by itself is perfectly normal here.

Yes, in this sentence sàn nhà means the floor.

More literally:

• sàn = floor surface
• nhà = house, home

So sàn nhà is the floor of a house or room.

Depending on region and context, you may also hear:

• nền nhà = floor, especially the ground/floor surface of a house
• sàn = floor
• sàn nhà = house floor, room floor

In this sentence, sàn nhà is completely natural and clear.

Yes, fairly similar.

The pattern is:

• Subject + verb + object + purpose phrase

So:

• Tôi = subject
• dùng chổi = verb + object
• để quét sàn nhà = purpose phrase

A very literal structure is:

• I use broom to sweep floor

English adds articles like a and the, but Vietnamese usually does not.

That is one reason Vietnamese can look more compact than English.

Yes.

• dùng = use
• sử dụng = use

But there is a small difference in style:

• dùng is more common in everyday speech
• sử dụng is a bit more formal or bookish

So:

• Tôi dùng chổi để quét sàn nhà = natural everyday Vietnamese
• Tôi sử dụng chổi để quét sàn nhà = correct, but slightly more formal than needed for casual conversation

Not always.

Vietnamese often drops the subject when it is already understood from context.

For example, if someone asks what you are doing, you might simply say:

• Dùng chổi để quét sàn nhà.

That can sound natural in conversation if the subject is obvious.

But as a full standalone sentence, especially for learners, including tôi is best:

• Tôi dùng chổi để quét sàn nhà.

It is natural and correct, but in everyday speech Vietnamese speakers might also choose shorter or more direct versions, such as:

• Tôi quét nhà bằng chổi. = I sweep the floor/house with a broom.
• Tôi dùng chổi quét nhà. = I use a broom to sweep the floor/house.
• Tôi quét sàn bằng chổi. = I sweep the floor with a broom.

Your original sentence is a good, clear learner-friendly sentence because every part is spelled out.

No. Quét has several related meanings depending on context.

Common meanings include:

• quét nhà / quét sàn = sweep the house / floor
• quét vôi / quét sơn = brush or apply lime/paint
• quét mã = scan a code
• quét dọn = clean up, sweep and tidy

In your sentence, because it is used with chổi and sàn nhà, the meaning is clearly sweep.