هي كانت في اجازة امبارح، وكانت في البيت.

A natural pronunciation would be:

heyya kānit fi igāza embāreḥ, wi-kānit fil-bēt

A few useful notes:

• هي = heyya or hiyya
• كانت = kānit in Egyptian speech
• إجازة / اجازة = igāza
• امبارح = embāreḥ
• و before a consonant is often pronounced wi-
• في البيت is often said together as fil-bēt

Also, in Egyptian Arabic, ج is usually pronounced like g in go, so اجازة sounds like igāza, not ijāza.

Yes, it could.

In Egyptian Arabic, subject pronouns are often dropped when the verb already makes the subject clear. So:

• هي كانت في اجازة امبارح = She was on vacation yesterday
• كانت في اجازة امبارح = also She was on vacation yesterday

Both are natural. Using هي can:

• add a little emphasis
• make the subject extra clear
• help if you are contrasting her with someone else

So هي is not required, but it is perfectly normal.

كانت means she was.

It is the feminine singular past form of كان / يكون, the verb related to to be.

Compare:

• هو كان = he was
• هي كانت = she was

This is important because Arabic marks gender in the past tense, so the -ت in كانت shows that the subject is feminine.

Because the sentence is giving two linked pieces of information:

• هي كانت في اجازة امبارح = She was on vacation yesterday
• وكانت في البيت = and she was at home

Repeating كانت is very natural in Arabic. It makes each clause complete and clear.

In English, we often avoid repeating was, but Arabic is usually more comfortable repeating it in this kind of structure.

If you removed the second كانت, the sentence might still be understandable in context, but repeating it sounds cleaner and more natural here.

This is just a difference between Arabic and English prepositions.

Arabic uses في in many places where English uses different prepositions such as:

• in
• at
• on

So:

• في اجازة literally looks like in vacation
• but the real meaning is on vacation

This is very common. You should learn في اجازة as a set expression.

اجازة in Egyptian Arabic usually means:

• vacation
• holiday
• leave
• day off

Its exact meaning depends on context.

So كانت في اجازة امبارح could mean she was:

• on vacation
• off work
• on leave

In everyday Egyptian speech, اجازة is a very common word.

امبارح means yesterday, and yes, it is very common in Egyptian Arabic.

A few related forms:

• Egyptian: امبارح
• Also heard in some dialects: مبارح
• Standard Arabic often uses: أمس or البارحة

So if you hear امبارح, that is a strong clue that the sentence is in colloquial Arabic, not formal Standard Arabic.

Yes, literally في البيت means in the house or in the home.

But very often, in natural English translation, it becomes at home.

So:

• هي كانت في البيت
  can be understood as
  She was at home

This is a good example of how literal translation and natural translation are not always identical.

The sentence shows feminine in two places:

• هي = she
• كانت = she was rather than he was

Compare:

• هو كان في اجازة امبارح، وكان في البيت = He was on vacation yesterday, and he was at home
• هي كانت في اجازة امبارح، وكانت في البيت = She was on vacation yesterday, and she was at home

So both the pronoun and the verb agree with a feminine subject.

The word order is flexible.

Your sentence:

• هي كانت في اجازة امبارح

could also be rearranged, for example:

• امبارح هي كانت في اجازة

Both are understandable. The difference is mostly about emphasis and style.

Putting امبارح earlier can emphasize the time:

• Yesterday, she was on vacation

Putting it later is also very natural and common.

و is the normal Arabic word for and.

In this sentence:

• وكانت = and she was

In Egyptian Arabic, و is often pronounced wi- before a consonant, so:

• وكانت sounds like wi-kānit

This is very common in speech.

Yes, absolutely.

The sentence naturally suggests both things were true yesterday:

• she was on vacation
• she was at home

There is no contradiction. In fact, they fit together very naturally: she had the day off or was on leave, and she stayed home.

So the sentence sounds like a normal description of her situation yesterday.