هو هيشتري شباك جديد للمطبخ بكرة.

They are doing two different jobs:

• هو = the independent pronoun he
• The هـ at the start of هيشتري is a future marker in Egyptian Arabic

So:

• هو = he
• هيشتري = he will buy

Together, هو هيشتري means he will buy.

A learner often sees this and thinks the pronoun is being repeated, but it is not. The first word is the subject pronoun, and the second word is the verb in the future.

You can absolutely drop هو and just say:

هيشتري شباك جديد للمطبخ بكرة

That still means He will buy a new window for the kitchen tomorrow.

In Egyptian Arabic, the verb already tells you the person/number/gender, so the subject pronoun is often optional. Speakers include هو when they want:

• clarity
• emphasis
• contrast, as in he will buy it, not someone else

So both are natural.

In Egyptian Arabic, the future is commonly formed by adding هـ or حـ before the verb stem.

Here:

• present/habitual: بيشتري = he buys / he is buying
• future: هيشتري = he will buy

So the future marker replaces the present بـ.

A useful mini-pattern is:

• بيكتب = he writes / is writing

• هيكتب = he will write

• بياكل = he eats / is eating
• هياكل = he will eat

So in your sentence, هيشتري is simply the future form of buy.

Because in Arabic, adjectives normally come after the noun they describe.

So:

• شباك جديد = literally window new
• natural English translation: a new window

This is the standard word order in Arabic:

• بيت كبير = a big house
• عربية جديدة = a new car
• شباك جديد = a new window

So even though it feels reversed from English, it is completely normal in Arabic.

Because شباك is a masculine singular noun, and the adjective has to agree with it.

So:

• شباك = masculine singular
• therefore: جديد = masculine singular adjective

If the noun were feminine, you would use جديدة instead. For example:

• عربية جديدة = a new car

This is basic adjective agreement in Arabic: adjectives match the noun in gender and number.

Because the phrase is indefinite: a new window, not the new window.

In Arabic, adjectives match nouns not only in gender and number, but also in definiteness.

So:

• شباك جديد = a new window
• الشباك الجديد = the new window

Notice that when the noun is definite, the adjective also becomes definite.

That is why you do not say شباك الجديد in this sentence.

للمطبخ is made of:

• لـ = for / to
• المطبخ = the kitchen

When لـ comes before الـ, they combine in writing:

• ل + المطبخ
• becomes للمطبخ

Here it means for the kitchen.

So شباك جديد للمطبخ is literally a new window for the kitchen. In English, we often say a new kitchen window, but Arabic commonly uses this for the kitchen structure.

Both can mean window, but they belong to different registers.

In Egyptian Arabic, شباك is the common everyday word.
نافذة is more formal and more associated with Modern Standard Arabic.

So if you are learning spoken Egyptian, شباك is the natural choice.

Also, depending on context, شباك can sometimes mean things like a service window or ticket window, but in this sentence it clearly means a regular house window.

Yes, it can move. Time words in Arabic are often flexible.

This sentence puts بكرة at the end, which is very natural:

هو هيشتري شباك جديد للمطبخ بكرة

But you could also say:

• بكرة هو هيشتري شباك جديد للمطبخ
• هو بكرة هيشتري شباك جديد للمطبخ

These all mean basically the same thing, but the placement changes the emphasis a little:

• sentence-final بكرة = neutral, very common
• sentence-initial بكرة = emphasizes tomorrow

So the end position is just a normal, natural choice.

A more MSA-style version would be something like:

هو سيشتري نافذةً جديدةً للمطبخ غدًا

or simply:

سيشتري نافذةً جديدةً للمطبخ غدًا

Some key differences:

• Egyptian هيشتري vs. MSA سيشتري
• Egyptian شباك vs. MSA نافذة
• Egyptian بكرة vs. MSA غدًا

So the sentence you were given is clearly colloquial Egyptian, not formal written Arabic.

A rough pronunciation guide would be:

huwwa hayishtiri shebbāk gedīd lel-matbakh bokra

A few useful notes:

• ج in Egyptian is usually pronounced like g in go, so جديد sounds like gedīd
• بكرة is often heard as bokra or bukra
• للمطبخ is often pronounced something like lel-matbakh

Transliterations vary a lot, so do not worry if you see slightly different spellings in Latin letters. The Arabic spelling is the important part.