تبدأ الممارسة اليوم.

Because this sentence is using a very common Arabic word order: verb + subject + adverb/time expression.

So:

• تبدأ = begins / starts
• الممارسة = the practice
• اليوم = today

In Arabic, it is very normal for the verb to come first. If you put the subject first instead, that is also possible:

• الممارسة تبدأ اليوم

Both are understandable, but تبدأ الممارسة اليوم has the more typical verbal-sentence structure in MSA.

The verb is feminine because the subject الممارسة is a feminine noun.

The base verb is from بدأ = to begin. In the present tense:

• يبدأ = he/it begins
• تبدأ = she/it begins

Since الممارسة is grammatically feminine, Arabic uses تبدأ.

Even though الممارسة refers to a thing or activity, Arabic nouns still have grammatical gender, and verbs must agree with that.

We know from the meaning of the verb and the sentence structure.

In تبدأ الممارسة اليوم, the verb تبدأ is intransitive here, meaning it does not take a direct object in this sentence. The noun after it, الممارسة, is the thing that is doing the action of beginning, so it is the subject.

So the sentence means:

• The practice begins today

not

• [Someone] begins the practice today

If Arabic wanted to say someone begins the practice today, you would expect a different structure, such as:

• يبدأ المدرّب الممارسة اليوم = The coach begins the practice today

Here المدرّب is the subject, and الممارسة becomes the object.

الممارسة comes from the root related to practice or exercising/doing something repeatedly. Depending on context, it can mean:

• practice
• training
• exercise
• the act of practicing

In this sentence, it most naturally means something like the practice session or training/practice.

Because the English meaning is already given to the learner, the important thing to notice is that الممارسة is a verbal noun or abstract noun, not a simple everyday noun like book or house.

الـ is the Arabic definite article, meaning the.

So:

• ممارسة = practice / a practice
• الممارسة = the practice

In this sentence, Arabic is referring to a specific practice, probably one already known from context, so it uses the definite form.

اليوم means today, and in Arabic, time expressions often come at the end of the sentence.

So this order is very natural:

• تبدأ الممارسة اليوم = The practice begins today

Arabic can sometimes move time words for emphasis, but the final position is very common and neutral.

No, not here.

Arabic often uses time expressions directly without a preposition, especially very common ones like:

• اليوم = today
• غدًا = tomorrow
• أمس = yesterday

So تبدأ الممارسة اليوم is completely natural.

You may sometimes see في هذا اليوم or other longer expressions, but for simple today, no preposition is needed.

Formally, تبدأ is present tense, but in Arabic the present tense can also refer to the near future depending on context.

So تبدأ الممارسة اليوم can be understood as:

• The practice begins today
• The practice is starting today

Because today points to a present or near-future time, the meaning is clear.

If you wanted to make the future more explicit, Arabic could use سـ or سوف:

• ستبدأ الممارسة اليوم = The practice will begin today

But in many cases, that is unnecessary.

It comes from the root ب د أ.

The basic past-tense verb is:

• بدأ = he began

From that root, the present tense form here is:

• تبدأ = she/it begins

This is a useful root to remember because it is common in formal Arabic.

It is pronounced approximately tabda'u in full careful MSA pronunciation.

A breakdown:

• تَ = ta
• بْ = b
• دَ = da
• أُ = a glottal stop plus u

In normal writing, short vowels are usually not written, so learners see تبدأ, but the full vocalized form is:

• تَبْدَأُ

The final ـُ is the normal ending for a present-tense indicative verb in formal Arabic.

The hamza is part of the root ب د أ. It is not optional.

So the verb must be written with hamza:

• بدأ
• يبدأ
• تبدأ

This is important because the hamza affects both spelling and pronunciation.

In full formal Arabic, since الممارسة is the subject of a verbal sentence, it would normally be nominative:

• تَبْدَأُ الْمُمَارَسَةُ الْيَوْمَ

So الممارسة would end in ـُ in full vocalization: الممارسةُ.

In normal everyday Arabic writing, these short case endings are usually omitted.

In this sentence, اليوم functions as an adverbial time expression, so in full vocalization it would normally be accusative:

• الْيَوْمَ

So the fully vocalized sentence would be:

• تَبْدَأُ الْمُمَارَسَةُ الْيَوْمَ

Again, in ordinary Arabic writing, these endings are usually not written.

Yes, depending on context.

Because الممارسة is definite, the most straightforward meaning is the practice begins today, referring to a specific practice or training session.

But Arabic sometimes uses definite nouns in ways that English may translate more generally. Still, without more context, a learner should understand it as a specific practice.

Not if الممارسة is the subject.

يبدأ is masculine, while الممارسة is feminine. So if the meaning is the practice begins today, you should say:

• تبدأ الممارسة اليوم

You would use يبدأ only with a masculine subject, for example:

• يبدأ الدرس اليوم = The lesson begins today

because الدرس is masculine.

Yes. Arabic allows some flexibility. For example:

• تبدأ الممارسة اليوم
• الممارسة تبدأ اليوم
• اليوم تبدأ الممارسة

All of these are possible, but they can sound slightly different in emphasis.

• تبدأ الممارسة اليوم = neutral, very natural verbal sentence
• الممارسة تبدأ اليوم = puts more focus on the practice
• اليوم تبدأ الممارسة = puts more focus on today

It is a verbal sentence because it begins with a verb: تبدأ.

In Arabic grammar:

• A sentence beginning with a verb is a verbal sentence
• A sentence beginning with a noun is a nominal sentence

So:

• تبدأ الممارسة اليوم = verbal sentence
• الممارسة تبدأ اليوم = nominal sentence in terms of word order, even though it still contains a verb

The fully vowelled form is:

تَبْدَأُ الْمُمَارَسَةُ الْيَوْمَ

This shows:

• تَبْدَأُ = present tense verb, indicative
• الْمُمَارَسَةُ = nominative subject
• الْيَوْمَ = accusative adverbial time expression

It is common, but a little more formal or abstract than some basic vocabulary words.

Depending on context, Arabic speakers might also use other words for specific kinds of practice or training, such as words meaning training, exercise, or rehearsal. But الممارسة is a very useful MSA word and appears often in formal writing and educational contexts.