Buổi tập bắt đầu hôm nay.

Buổi is a noun-like time word that often refers to a session, occasion, or part of the day, depending on context.

In buổi tập, it helps form the idea of a practice session or training session. So here it is not just time in a general sense; it is part of the expression naming the event.

Examples:

• buổi sáng = morning
• buổi học = class session
• buổi tập = practice/training session

It is best to learn buổi tập as a natural noun phrase meaning practice session.

• buổi = session/occasion
• tập = practice, train

Together, buổi tập functions like a single idea: the training session or practice session.

So in this sentence, buổi tập is the thing that bắt đầu.

Vietnamese usually does not require articles like the and a/an.

Whether buổi tập means a practice session, the practice session, or even practice more generally depends on context.

In a real situation, listeners usually already know which session is being talked about, so buổi tập can naturally stand on its own without an article.

Because buổi tập already acts as the subject.

The structure is:

• Buổi tập = the practice session
• bắt đầu = begins/starts
• hôm nay = today

So the sentence already has a clear subject. English sometimes uses it in places where Vietnamese does not, but here Vietnamese simply names the thing directly.

Bắt đầu means to begin or to start. It is a very common two-syllable verb phrase that functions as a single lexical unit.

In this sentence, bắt đầu is the main verb:

• Buổi tập bắt đầu hôm nay = the practice session begins today

You should learn bắt đầu as one expression, even though it is written as two separate syllables.

Vietnamese often places time expressions after the verb, especially in simple statements.

So this order is very natural:

• Buổi tập bắt đầu hôm nay

It is similar to saying:

• subject + verb + time

Vietnamese is generally flexible with time expressions, but putting hôm nay at the end sounds completely normal here.

Usually it means the event starts today in relation to the time frame being discussed, not necessarily right this second.

Vietnamese often uses the plain verb without a special future marker if the time expression already makes the timing clear. Because hôm nay is present, listeners understand when the starting happens.

So Vietnamese does not always need an extra word like will.

Yes, you could say:

Buổi tập sẽ bắt đầu hôm nay.

That is grammatical, but in many contexts it sounds unnecessary because hôm nay already tells you the time. Vietnamese often leaves out sẽ when the timing is obvious.

Using sẽ can add a stronger sense of future or prediction, but the original sentence is already natural.

Yes. You can also say:

Hôm nay buổi tập bắt đầu.

This is understandable and grammatical. Putting hôm nay first gives it more emphasis, like Today, the practice session begins.

However, the original version: Buổi tập bắt đầu hôm nay is also very natural and straightforward.

In the given sentence, hôm nay most naturally tells you when the session starts.

If you want to say today’s practice session more clearly, Vietnamese would usually place hôm nay directly after the noun phrase:

Buổi tập hôm nay... = today’s practice session...

So word position matters:

• Buổi tập bắt đầu hôm nay = the practice session starts today
• Buổi tập hôm nay... = today’s practice session...

It is not a typical general classifier like cái, con, or quyển. It is better understood as a time/session noun that helps count or identify events and periods.

For example:

• một buổi học = one class session
• một buổi họp = one meeting
• một buổi tập = one practice session

So it behaves a bit like a measure word or session word, but learners usually understand it best by remembering that it refers to an occasion/session.

The sentence is:

Buổi tập bắt đầu hôm nay.

A rough syllable breakdown is:

• buổi
• tập
• bắt
• đầu
• hôm
• nay

A few pronunciation notes:

• buổi has a gliding vowel and a falling-rising tone
• tập ends with a final p, so it is short and clipped
• bắt also ends sharply with t
• đầu begins with đ, which sounds like English d, not z or y
• hôm nay is a very common phrase, pronounced smoothly together

If you want to sound natural, keep the short final consonants in tập and bắt crisp and do not stretch them out.

Yes, depending on context, Vietnamese might also say things like:

• Buổi tập bắt đầu từ hôm nay. = the training starts from today
• Hôm nay buổi tập bắt đầu. = today the practice session begins
• Buổi tập sẽ bắt đầu hôm nay. = the practice session will start today

The original sentence is simple and natural, but Vietnamese often allows several wordings with slightly different emphasis.