دق جرس الباب مرتين، بس ما حدا فتح.

Yes. In this sentence, دق means he knocked / rang. It can be used transitively with things like جرس (bell) to mean ring the bell.

So:

• دق جرس الباب = he rang the doorbell
• دق الباب = he knocked on the door

In Levantine, دق is very common for both knocking and ringing, depending on the object that follows.

جرس الباب literally means the bell of the door, which is just the normal way to say doorbell.

This is an idafa (possessive/genitive construction):

• جرس = bell
• الباب = the door

Together:

• جرس الباب = the doorbell

Notice that in this structure, the first noun usually does not take الـ, while the second one can.

مرتين means twice.

It comes from مرة meaning time / occasion. In colloquial Arabic, the dual form often expresses two times:

• مرة = one time
• مرتين = two times / twice

So:

• دق جرس الباب مرتين = he rang the doorbell twice

This is a very common way to express frequency in Levantine.

Because Arabic verbs already contain the subject.

دق by itself can mean he knocked / he rang in context. Arabic often drops subject pronouns unless they are needed for emphasis or clarity.

So you do not need a separate word like هو here.

• دق = he rang
• هو دق = he rang (with extra emphasis or contrast)

Here, بس means but.

So:

• ... بس ما حدا فتح = ... but nobody opened

In Levantine, بس is very common and can mean different things depending on context, including:

• but
• only / just
• sometimes a sense like enough

In this sentence, it clearly means but.

حدا means someone / anyone / someone-or-other, depending on context. With ما, the phrase ما حدا means nobody / no one.

So:

• حدا فتح = someone opened
• ما حدا فتح = nobody opened

This is a very common Levantine way to express no one.

Because ما حدا works as a fixed negative expression meaning nobody / no one.

• ما حدا فتح = nobody opened

If you say حدا ما فتح, it would sound like someone didn’t open, which is a different meaning.

So the negation is attached to the indefinite person word:

• ما حدا = no one
• ما شي = nothing (in some dialect usage)
• ما في = there isn’t / there aren’t

Because حدا is grammatically singular in this kind of structure. It refers to a person / anyone, and with ما حدا the meaning becomes no person / nobody.

So the verb stays singular:

• ما حدا فتح = nobody opened

This matches the underlying idea of not even one person opened.

Literally, فتح means opened. But in this context, it naturally means opened the door or answered the door.

Arabic often leaves the object understood when it is obvious from context.

So:

• ما حدا فتح literally = nobody opened
• natural English meaning = nobody opened the door / answered the door

Yes, very normal.

The sentence is:

• دق جرس الباب مرتين، بس ما حدا فتح.

A natural breakdown is:

• دق = rang
• جرس الباب = the doorbell
• مرتين = twice
• بس = but
• ما حدا فتح = nobody opened

This kind of verb-first structure is very common, especially in narration.

In Modern Standard Arabic, you might see something like:

• قرع جرس الباب مرتين، لكن لم يفتح أحد.

Differences:

• دق is very colloquial/common in Levantine; MSA might prefer قرع
• بس in Levantine corresponds to لكن in MSA
• ما حدا فتح is colloquial; MSA would more likely use لم يفتح أحد

So the original sentence sounds naturally spoken and Levantine.

A common Levantine-style pronunciation would be approximately:

daʔ jaris il-bāb martein, bas ma ḥada fataḥ

A few notes:

• دق is often pronounced with a glottal stop at the end: daʔ
• جرس may sound like jaras/jaris, depending on speaker and region
• مرتين sounds like martein
• حدا is ḥada
• فتح is fataḥ

Pronunciation varies a bit across Syria, Lebanon, Jordan, and Palestine, but this is a good general guide.

Not in natural Levantine conversation.

• حدا = the normal Levantine word
• أحد = more formal / MSA

So in everyday speech, you would say:

• ما حدا فتح

Using أحد here would sound formal, written, or non-colloquial.