في الحافلة تقرأ أمي صحيفة، ثم تقرأ خبرا مهما عن الطقس.

In natural English, it usually corresponds to on the bus.

Arabic often uses في for situations where English uses either in or on, especially with vehicles and places. So في الحافلة is literally in the bus, but idiomatically it is often best translated as on the bus.

Arabic often puts a place or time expression first to set the scene.

So the sentence starts with:

• في الحافلة = the location
• then the main action: تقرأ أمي صحيفة

This is similar to English sentences like:

• On the bus, my mother reads a newspaper.

It is not the only possible order, but it is very natural.

Both are possible, but they feel slightly different.

• تقرأ أمي صحيفة is a more standard verb-first sentence in Arabic.
• أمي تقرأ صحيفة is also correct, but it gives أمي more topic or emphasis, like my mother is reading a newspaper.

So in this sentence, تقرأ أمي is just a normal narrative order.

تقرأ is the imperfect/present form of the verb قرأ = to read.

Here it is third-person feminine singular, so it matches أمي.

Depending on context, تقرأ can mean:

• she reads
• she is reading

Arabic does not always separate these two meanings as clearly as English does. Context tells you which one is meant.

Because Arabic verbs already include the subject information.

In this sentence, تقرأ already tells you the subject is feminine singular. Then أمي makes it explicit that the subject is my mother.

So Arabic often does not need a separate word for she the way English does.

أمي means my mother.

It is made from:

• أم = mother
• ـي = my

So:

• أم = mother
• أمي = my mother

That final ـي is a possessive suffix attached directly to the noun.

They are indefinite because they mean:

• صحيفة = a newspaper
• خبرا = a piece of news / a report / a news item

If they were definite, you would normally see ال:

• الصحيفة = the newspaper
• الخبر = the news item / the report

So the sentence is talking about a newspaper and an important news item/report, not specific ones already known to the listener.

In normal Arabic writing, short vowel endings are usually not written.

So in a fully vocalized version, you would see something like:

• صحيفةً
• خبرًا
• مهمًّا

But in ordinary unvocalized text, these usually appear as:

• صحيفة
• خبرا
• مهما

So the grammar is still there, but the short vowels are usually omitted in writing.

This is because the fully vocalized form is خبرًا.

An indefinite accusative noun often takes tanwīn fatḥ and is written with an extra ا at the end. When the vowel marks are removed, that extra ا often stays, so you get:

• خبرًا → خبرا

So the final ا is a spelling clue that the full form is accusative indefinite.

Because Arabic adjectives normally come after the noun they describe.

So:

• خبرًا مهمًّا = an important report/news item

The adjective must agree with the noun in:

• gender
• number
• definiteness
• case

Here, خبرًا is:

• masculine
• singular
• indefinite
• accusative

So the adjective matches it:

• مهمًّا

If the noun were definite, the adjective would also be definite:

• الخبر المهم

ثم means then.

It shows sequence: one action happens, and after that, another action happens.

So the sentence structure is:

• first: تقرأ أمي صحيفة
• then: تقرأ خبرا مهما عن الطقس

Compared with و = and, ثم usually gives a stronger sense of after that or next.

Because Arabic often uses the definite form for general concepts like the weather.

So:

• عن الطقس = about the weather

This is very natural in Arabic. The preposition عن means about / concerning.

Because Arabic خبر is usually a countable noun meaning:

• a piece of news
• a report
• a news item

English news is uncountable, but Arabic often expresses the idea as a single item:

• خبر مهم = an important piece of news
• أخبار = news items / reports / news

So خبرا مهما is literally an important news item/report.