انا قاعد في المطبخ من الصبح، وهي قاعدة قدام الكمبيوتر بتشتغل.

Yes. Literally, قاعد means sitting for a masculine subject, and قاعدة means sitting for a feminine subject.

In Egyptian Arabic, though, these words often do more than just describe posture. They can also help express an ongoing situation, a bit like be + -ing in English.

So:

• أنا قاعد في المطبخ = literally I am sitting in the kitchen
• but naturally it can also feel like I’m staying / I’ve been in the kitchen

And:

• هي قاعدة قدام الكمبيوتر بتشتغل = she’s sitting in front of the computer, working

So here قاعد/قاعدة keep their literal sense of sitting, but they also help create the feel of an ongoing scene.

Because قاعد changes for gender:

• قاعد = masculine
• قاعدة = feminine

So:

• a male speaker says أنا قاعد
• a female speaker says أنا قاعدة
• هي قاعدة because هي refers to a woman/girl

This kind of agreement is very common in Arabic.

In the present tense, Arabic usually does not use an overt verb for am / is / are.

So English says:

• I am in the kitchen
• She is in front of the computer

But Egyptian Arabic simply says:

• أنا في المطبخ
• هي قدام الكمبيوتر

When you add قاعد/قاعدة, you still do not need a separate word for am/is. The sentence is complete without it.

من الصبح means since the morning or since morning.

Breakdown:

• من = from / since
• الصبح = the morning

In time expressions, من often marks the starting point:

• من امبارح = since yesterday
• من بدري = since early / for a while already
• من الصبح = since morning

So أنا قاعد في المطبخ من الصبح gives the sense that this has been going on from morning until now.

Because this is Egyptian Colloquial Arabic.

الصبح is the normal everyday Egyptian way to say morning. A more formal or MSA-style version would be الصباح.

So:

• من الصبح = everyday Egyptian
• من الصباح = more formal / Standard Arabic style

A learner will hear الصبح very often in normal speech.

قدام means in front of.

So:

• قدام الكمبيوتر = in front of the computer

It functions very naturally in Egyptian as a location word. You can use it with nouns and pronouns:

• قدام البيت = in front of the house
• قدامي = in front of me
• قدامها = in front of her

In this sentence, it tells you where she is sitting.

Because Arabic word order is flexible, and this order is very natural in Egyptian.

The clause paints the scene in stages:

• هي = she
• قاعدة = sitting
• قدام الكمبيوتر = in front of the computer
• بتشتغل = working

So the sentence first sets up her position, then adds what she is doing. In English we often do something similar:

• She’s sitting in front of the computer, working.

This order feels very natural in spoken Egyptian.

The بـ is the normal present-tense marker in Egyptian Arabic.

The verb here is based on يشتغل / تشتغل = to work. In Egyptian, the present form usually takes بـ:

• بشتغل = I work / I’m working
• بتشتغل = you work / she works / she’s working
• بيشتغل = he works / he’s working

In this sentence, بتشتغل means she is working.

Because هي is feminine singular, بتشتغل is the correct form.

Yes, you may hear that too.

• بتشتغل = present-tense verb, she is working
• شغالة = active participle, also often used to mean working

Both can work, but the nuance can shift a little depending on context.

• هي قاعدة قدام الكمبيوتر بتشتغل sounds like she’s sitting at the computer doing work
• هي قاعدة قدام الكمبيوتر شغالة can also mean that, but active participles in Egyptian sometimes feel slightly more state-like

In everyday speech, both patterns are common and natural.

وهي means and she:

• و = and
• هي = she

Arabic often repeats the subject more explicitly than English does, especially when starting a new clause.

So:

• أنا قاعد في المطبخ من الصبح، وهي قاعدة...

This is very natural. It clearly marks the shift from I to she.

If you only said و قاعدة..., the subject might be less clear unless the context already made it obvious.

It suggests:

• أنا قاعد في المطبخ من الصبح = a situation that started in the morning and is still continuing
• وهي قاعدة قدام الكمبيوتر بتشتغل = what she is doing now in that scene

So the first clause has a since morning / ongoing up to now feel, while the second gives a current ongoing action.

That combination is very natural in Egyptian Arabic.

Yes, quite different in style.

A more MSA-like version would be something like:

• أنا جالس في المطبخ منذ الصباح، وهي جالسة أمام الكمبيوتر تعمل.

Main differences:

• جالس / جالسة instead of قاعد / قاعدة
• منذ الصباح instead of من الصبح
• أمام instead of قدام
• a more formal overall tone

The original sentence is clearly Egyptian and conversational.