بعد أن أقرأ الخبر في الصحيفة، أرسل رسالة إلى صديقتي.

In Arabic, the imperfect form (often called the present tense) can do more than just mean present time.

Here it can express:

• a habitual action: After I read the news in the newspaper, I send a message to my friend
• or a future sequence, depending on context: After I read..., I will send...

So Arabic does not always need a separate future form the way English often does. The time reference is often understood from context.

أن introduces a subordinate clause, roughly like that / to / after depending on the structure.

In بعد أن أقرأ:

• بعد = after
• أن أقرأ = the clause I read

Together, بعد أن أقرأ means after I read.

Also, in formal grammar, أن causes the following imperfect verb to be in the subjunctive. So if full case vowels were written, it would be:

• أقرأَ

In normal Arabic writing, those short vowels are usually not written, so you just see أقرأ.

Because Arabic verbs already include the subject.

• أقرأ = I read
• أرسل = I send

The prefix أـ marks first person singular in the imperfect.

So Arabic often does not need a separate pronoun like أنا unless you want emphasis or contrast.

For example:

• أنا أقرأ الخبر = I am the one who reads the news / I read the news
• أقرأ الخبر = simply I read the news

بعد can be followed by:

• a noun
• or a clause

When it is followed by a verb clause, أن is commonly used in Modern Standard Arabic.

So:

• بعد القراءة = after the reading
• بعد أن أقرأ = after I read

Both are correct structures, but they are built differently.

Yes, in fully vocalized formal Arabic, أن puts the following imperfect verb into the subjunctive.

So:

• basic form: أقرأُ
• after أن: أقرأَ

But in ordinary writing, the final short vowel is usually not shown, so both appear as أقرأ.

A learner should know the grammatical change is there, even if the spelling usually does not show it.

الخبر literally means the news, but depending on context it can also mean:

• a news item
• a report
• sometimes an article/story in a newspaper

So in this sentence, it most likely means a specific piece of news or news report that the speaker reads in the paper.

Because it has الـ, it is definite:

• خبر = news / a piece of news
• الخبر = the news / the report

في usually means in.

So في الصحيفة literally means in the newspaper.

This is natural in Arabic, just as English says in the newspaper rather than on the newspaper when talking about published content.

Also:

• صحيفة = newspaper
• الصحيفة = the newspaper

Both can be possible in many contexts, but إلى is very natural with verbs of sending because it clearly marks the destination/recipient.

So:

• أرسل رسالة إلى صديقتي = I send a message to my friend

You may also hear:

• أرسل رسالة لصديقتي

That can also mean I send a message to my friend, but إلى often feels a bit more explicitly directional in formal Arabic.

صديقتي is made from:

• صديقة = female friend
• ـي = my

So:

• صديقتي = my female friend

A useful detail: when a word ending in ـة takes a suffix, the t sound reappears in pronunciation.

So صديقة is pronounced roughly ṣadīqah, but صديقتي is pronounced ṣadīqatī.

Arabic nouns are gendered, so the word for friend changes depending on whether the friend is male or female.

• صديق = male friend
• صديقة = female friend

So صديقتي specifically means my female friend.

If the friend were male, it would be:

• صديقي = my male friend

Yes. Arabic allows some flexibility.

This sentence begins with the time clause:

• بعد أن أقرأ الخبر في الصحيفة، أرسل رسالة إلى صديقتي.

You could also say:

• أرسل رسالة إلى صديقتي بعد أن أقرأ الخبر في الصحيفة.

Both are grammatical. Starting with بعد أن... gives the time relationship first, a bit like English After I read..., I send...

Yes. In fully vocalized formal Arabic, the sentence would look something like:

بعدَ أن أقرأَ الخبرَ في الصحيفةِ، أرسلُ رسالةً إلى صديقتي.

Some of the endings are:

• بعدَ: accusative/adverbial form
• أقرأَ: subjunctive after أن
• الخبرَ: accusative as the direct object
• الصحيفةِ: genitive after في
• أرسلُ: indicative
• رسالةً: accusative as the direct object

In normal Arabic writing, these short vowels are usually omitted.

It can mean either, depending on context.

It may describe:

• a habit: After I read the news in the newspaper, I send a message to my friend
• a future action: After I read the news in the newspaper, I will send a message to my friend

Arabic often leaves this kind of distinction to context unless extra words are added.

For example:

• كل يوم would make it clearly habitual: every day
• غدًا would help make it clearly future: tomorrow

The comma separates the introductory time clause from the main clause:

• بعد أن أقرأ الخبر في الصحيفة، = introductory clause
• أرسل رسالة إلى صديقتي = main clause

In Arabic, punctuation is used somewhat similarly to English, and the Arabic comma is ،. It helps readability, especially when a sentence begins with a longer clause.