أكدت الحجز بعد الشكوى مبارح.

It can be either one in unvoweled Arabic writing.

In Levantine speech:

• أكدت = akkadt = I confirmed
• أكدت = akkadet = she confirmed

So the spelling is the same, and context tells you which one is meant. This is very common in Arabic.

Because Arabic often drops subject pronouns when the verb already shows the subject.

So instead of saying:

• أنا أكدت الحجز
• هي أكدت الحجز

you can simply say:

• أكدت الحجز

That sounds normal. You only add أنا or هي if you want emphasis or extra clarity.

It is the past tense of أكّد — a verb meaning to confirm or to make sure of something.

In this sentence, it works much like English confirm:

• أكدت الحجز = confirmed the reservation

So grammatically, الحجز is the direct object of the verb.

Because أكّد can directly take an object.

So:

• أكدت الحجز = I/she confirmed the reservation

That is the normal structure.

If you add a preposition like على, the meaning usually shifts and no longer means the simple booking/reservation sense as directly. For this sentence, أكدت الحجز is the natural structure.

Because it usually refers to a specific, known reservation/booking.

So:

• حجز = a reservation / booking
• الحجز = the reservation / the booking

In context, if both speaker and listener know which booking is being talked about, Arabic very naturally uses الحجز.

Literally, it means after the complaint.

Yes, that structure is natural: بعد + noun.

So:

• بعد الشكوى = after the complaint
• بعد الاجتماع = after the meeting
• بعد الدرس = after the lesson

In more conversational Levantine, people also often say بعد ما + a verb:

• بعد ما اشتكيت = after I complained
• بعد ما قدمت شكوى = after I filed a complaint

So the sentence is fine, but بعد ما... can sound more conversational depending on context.

مبارح means yesterday, and it is colloquial Levantine.

In Standard Arabic, you would usually say:

• أمس

So:

• Levantine: مبارح
• Standard Arabic: أمس

A learner should recognize مبارح as one of the most common everyday Levantine time words.

By default, a listener will often understand مبارح as a time expression for the main event of the sentence:

• أكدت الحجز بعد الشكوى مبارح
  often understood as something like
  I/she confirmed the reservation after the complaint, yesterday

But yes, there is some possible ambiguity. If you want to be clearer, you can move things around:

• مبارح أكدت الحجز بعد الشكوى = Yesterday I/she confirmed the reservation after the complaint
• أكدت الحجز بعد الشكوى اللي صارت مبارح = I/she confirmed the reservation after the complaint that happened yesterday

So the original sentence is possible, but Arabic word order can leave room for interpretation unless context makes it obvious.

This is a great question because the pronunciation is not the same.

1. الحجز

The ح is a moon letter, so the ل of الـ is pronounced:

• الحجز → il-ḥajz or el-ḥajz depending on accent

2. الشكوى

The ش is a sun letter, so the ل sound disappears and the next consonant doubles:

• الشكوى → ish-shakwa or esh-shakwa

So in speech, you usually hear something like:

• akkadt il-ḥajz baʿd ish-shakwa mbāreḥ

It sounds like a mix, which is very common in real life.

• مبارح is clearly colloquial Levantine.
• أكدت and الشكوى are perfectly understandable in Levantine, but they can feel a bit more formal or neutral than very casual street-style speech.

A very everyday spoken version might be something like:

• أكدت الحجز بعد ما اشتكيت مبارح
• أكدت الحجز بعد ما قدمت شكوى مبارح

So the sentence is not wrong at all. It just feels like natural spoken Arabic with a somewhat formal vocabulary choice in places.

Because this -ت is a verb ending, not a noun ending.

In أكدت, the ت is part of the past-tense conjugation:

• I confirmed
• she confirmed

That is completely different from the ـة / ة you see at the end of many nouns and adjectives, like:

• شكوى
• سيارة
• كبيرة

So here, ت is grammatical verb morphology, not a feminine noun marker.

A common pronunciation would be something like:

• akkadt il-ḥajz baʿd ish-shakwa mbāreḥ
  if it means I confirmed...

or

• akkadet il-ḥajz baʿd ish-shakwa mbāreḥ
  if it means she confirmed...

A few helpful notes:

• ح is a strong throaty ḥ
• ع in بعد is the consonant ʿayn
• مبارح is often pronounced mbāreḥ
• الشكوى becomes ish-shakwa because of sun-letter assimilation

Yes, Standard Arabic would usually look and sound a bit different.

A more Standard-Arabic-style version might be:

• أكّدتُ الحجز بعد الشكوى أمس
• أكّدتْ الحجز بعد الشكوى أمس

Main differences:

• أمس instead of مبارح
• case endings might appear in formal reading
• pronunciation is more formal and less reduced than Levantine speech

So the sentence you were given is better understood as Levantine or mixed everyday Arabic, not strict formal Standard Arabic.