يبدأ الاجتماع بعد ساعة في المكتب.

Because Modern Standard Arabic often uses verb–subject order as a normal, neutral sentence pattern.

So:

• يبدأ الاجتماع = literally begins the meeting
• natural English = The meeting begins

Arabic could also say الاجتماع يبدأ..., but starting with the verb is very common.

يبدأ is an imperfect verb (the form often used for present or future meaning).

Here it is:

• 3rd person
• masculine
• singular

It comes from the root ب د أ, related to beginning or starting.

So يبدأ means he begins / it begins / begins, depending on context. In this sentence, it agrees with الاجتماع (the meeting), which is grammatically masculine singular.

Grammatically, the Arabic imperfect can express either present or future.

In this sentence, بعد ساعة (after an hour / in an hour) makes the meaning future, so the natural English sense is:

• The meeting will begin in an hour

Without a time expression, يبدأ الاجتماع could also mean The meeting begins or The meeting is beginning, depending on context.

Yes, الاجتماع is still the subject.

In Arabic, the subject often comes after the verb in verbal sentences. So in:

• يبدأ الاجتماع

the verb comes first, and the subject follows.

This does not make الاجتماع an object. It is still the thing doing the action: the meeting is what begins.

Arabic has no indefinite article like English a/an.

So:

• ساعة = an hour / hour
• الساعة = the hour / the clock / the time, depending on context

In this sentence, ساعة is indefinite, so the meaning is an hour.

Yes. Literally, بعد ساعة means after an hour.

In English, though, when talking about something that will happen one hour from now, we often say:

• in an hour

So:

• يبدأ الاجتماع بعد ساعة
• literally: The meeting begins after an hour
• natural English: The meeting begins in an hour

Grammatically, بعد is a time expression meaning after, and ساعة is the noun that follows it.

Because في basically means in, but English often uses either in or at depending on what sounds natural.

So:

• في المكتب can mean in the office
• and in some contexts, English may prefer at the office

Arabic keeps في, while English chooses the most natural preposition for the situation.

Because it has the definite article الـ, which means the.

So:

• مكتب = an office / office
• المكتب = the office

The sentence is referring to a specific office, not just any office.

Yes. Arabic word order is fairly flexible.

You can say:

• يبدأ الاجتماع بعد ساعة في المكتب
• يبدأ الاجتماع في المكتب بعد ساعة

Both are grammatical. The difference is usually about focus or style, not basic meaning.

In many cases, Arabic moves time and place phrases around more freely than English does.

With full vocalization, it would be:

يبدأُ الاجتماعُ بعدَ ساعةٍ في المكتبِ.

The endings show the grammar more clearly:

• يبدأُ = the verb
• الاجتماعُ = subject, nominative
• بعدَ = time expression, accusative
• ساعةٍ = genitive after بعد in this construction
• في المكتبِ = prepositional phrase, with المكتبِ in the genitive after في

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

يبدأ is pronounced roughly yabdaʾu in fully read MSA.

The ء is a hamza, which represents a glottal stop, a brief catch in the throat. So the word is not smoothly yabda; it has a break near the end:

• yab-da-ʾu

This hamza is part of the root ب د أ.

The final ة is called tāʾ marbūṭa, and it usually marks many feminine nouns.

ساعة is a feminine noun, so it uses ة.

How it sounds depends on how carefully the word is pronounced:

• in pause, it often sounds like -a / -ah
• with full grammatical endings in connected formal speech, it can sound like -t

So in fully pronounced MSA, ساعةٍ may be read as sāʿatin. But in less formal pronunciation, learners often hear something closer to sāʿa.