امروز اینترنت خراب است، برای همین به تو زنگ میزنم.

A natural word-for-word breakdown is:

• امروز = today
• اینترنت = internet
• خراب = broken, out of order, down
• است = is
• برای همین = for this reason, that’s why, so
• به تو = to you
• زنگ میزنم = I call / I am calling

So the structure is basically:

• Today the internet is down, so I’m calling you.

A more literal version would be:

• Today internet broken is, for this reason to you call do-I.

That sounds strange in English, but it helps show how Persian is built.

Yes, خراب literally means broken, ruined, or not working properly. In Persian, it is very common to use خراب for things like:

• ماشین خراب است = The car is broken.
• تلفن خراب است = The phone is not working.
• اینترنت خراب است = The internet is down / not working.

So even though English often says the internet is down or the internet isn’t working, Persian often uses خراب in these situations.

است is the formal written form of is.

So:

• اینترنت خراب است = The internet is broken / down.

In everyday spoken Persian, است is often dropped or replaced by a shorter form:

• اینترنت خرابه = The internet is down.
• اینترنت خراب است = more formal or written

So yes, it can often be left out in speech, but in standard writing است is very common.

برای همین means for this reason, because of this, or more naturally in English, so or that’s why.

In this sentence:

• امروز اینترنت خراب است، برای همین به تو زنگ میزنم
• The internet is down today, so I’m calling you.

It connects the first idea to the result.

Similar Persian expressions are:

• پس = so
• بنابراین = therefore
• به همین دلیل = for this reason / for this reason exactly

Among these, برای همین is very common in everyday speech.

The verb زنگ زدن literally means to ring or to make a call, and it works with به for the person being called.

So Persian says:

• به تو زنگ میزنم
• literally: I ring to you
• natural English: I’m calling you

This is just how the verb is constructed in Persian.

More examples:

• به مادرم زنگ زدم = I called my mother.
• به من زنگ بزن = Call me.
• چرا به من زنگ نزدی؟ = Why didn’t you call me?

So if you are the person receiving the call, Persian usually marks you with به.

Yes. زنگ زدن is a compound verb.

It is made of:

• زنگ = bell, ring
• زدن = to hit, strike, do

But together, زنگ زدن means to call / to ring.

In the present tense:

• میزنم comes from زدن
• so زنگ میزنم = I call / I am calling

This is very common in Persian. Many verbs are built from a noun + a light verb such as کردن, زدن, دادن, or گرفتن.

The Persian present tense with می- often covers both:

• simple present: I call
• present continuous: I am calling

So:

• زنگ میزنم can mean I call or I’m calling

In this sentence, because of the context, English prefers I’m calling you. The speaker means they are calling right now because the internet is down.

So Persian does not always make the same tense distinction that English does.

In standard Persian spelling, it is best written as:

• می‌زنم

with a half-space (also called a zero-width non-joiner) between می and زنم.

So the fully standard version of the sentence is:

• امروز اینترنت خراب است، برای همین به تو زنگ می‌زنم.

You may also see informal typing without the half-space:

• میزنم

That is very common online, but می‌زنم is the standard spelling.

Yes. In spoken Persian, به تو often becomes بهت.

So these are equivalent:

• به تو زنگ میزنم
• بهت زنگ میزنم

Both mean I’m calling you, but بهت sounds more natural in everyday conversation.

Similarly:

• به من → بهم
• به او → بهش
• به ما → بهمون
• به شما → بهتون
• به آنها / به اونا → بهشون

So a very natural spoken version would be:

• امروز اینترنت خرابه، برای همین بهت زنگ می‌زنم.

امروز means today, and Persian often places time expressions near the beginning of the sentence.

So:

• امروز اینترنت خراب است
• literally: Today the internet is down

This is very natural in Persian.

You could also move it, depending on emphasis, but the beginning is the most neutral and common position.

For example:

• اینترنت امروز خراب است = The internet is down today.

That is also possible, but امروز اینترنت خراب است sounds very normal.

It is mostly neutral, but it mixes slightly formal and everyday elements.

• است is more formal/written than ـه
• برای همین is common and conversational
• تو is informal singular you

So the sentence sounds like standard written Persian directed to someone the speaker knows well.

A more conversational version would be:

• امروز اینترنت خرابه، برای همین بهت زنگ می‌زنم.

A more formal version, speaking to you formally, would be:

• امروز اینترنت خراب است، برای همین به شما زنگ می‌زنم.

A natural pronunciation is approximately:

• emruz internet xarâb ast, barâye hamin be to zang mizanam

A few notes:

• خ in خراب is like the ch in German Bach or Scottish loch
• زنگ is pronounced zang
• می‌زنم is mizanam
• In fast speech, است may sound shorter, and many speakers would instead say خرابه

So in everyday spoken Persian, you will often hear something close to:

• emruz internet xarâbe, barâye hamin behet zang mizanam