بعد ما وصلت البيت، غسلت الطماطم والخيار في الحوض.

In Egyptian Arabic, بعد ما is a very common way to introduce a time clause meaning after.

So:

• بعد ما وصلت البيت = after I arrived home

Here, ما does not mean what, and it is not a negative marker. It is just part of the colloquial expression بعد ما.

Because the sentence is narrating two completed actions in the past:

1. arriving home
2. washing the tomatoes and cucumber(s)

Egyptian Arabic commonly uses:

• a past verb after بعد ما for the earlier completed action
• another past verb for the main action that happened after it

So the structure is basically:

• After I arrived home, I washed...

The ending -ت marks the past tense form used with I, and also with you masculine singular in Egyptian Arabic.

So:

• وصلت can mean I arrived or you arrived
• غسلت can mean I washed or you washed

Context tells you which one is meant. If needed, a speaker can add a pronoun:

• أنا وصلت = I arrived
• إنت وصلت = you arrived

Because Arabic verbs already include the subject information, so the pronoun is often omitted.

In this sentence, وصلت and غسلت already tell you the subject grammatically, so أنا is not necessary. Adding أنا would usually be for emphasis, contrast, or extra clarity.

With وصل, Egyptian Arabic very often puts the destination directly after the verb:

• وصلت البيت = I arrived home / I reached the house

You may also hear وصلت للبيت, but وصلت البيت is completely natural and common.

So this is not a mistake or an omission. It is a normal Egyptian pattern.

In Arabic, the definite article الـ is often used with food items and everyday objects in ways that do not match English exactly.

Here, الطماطم and الخيار most naturally refer to the tomatoes and cucumber(s) relevant in the situation — the ones being washed.

English and Arabic do not always line up perfectly with definiteness, especially with grocery and ingredient words.

In everyday Egyptian Arabic, خيار often works like a general food noun, so in context it can mean cucumber as an ingredient or cucumbers more generally.

If you specifically want to say one cucumber, you will often hear:

• خيارة

Similarly, طماطم is often used as a general grocery/food word rather than a neatly countable English-style plural.

So in this sentence, it is best to understand الطماطم والخيار as the produce being washed, not to over-focus on whether English would choose singular or plural.

It means in the sink or in the basin.

In this context, الحوض most naturally means the sink, especially a kitchen sink.

So:

• في = in
• الحوض = the sink / basin

Yes, this is very natural.

The sentence is structured like this:

• بعد ما وصلت البيت = time clause first
• غسلت الطماطم والخيار = main clause
• في الحوض = place phrase

This is a very normal way to tell a short sequence of actions in Egyptian Arabic.

A more formal MSA version would be something like:

بعدما وصلتُ إلى البيت، غسلتُ الطماطم والخيار في الحوض.

Some key differences:

• MSA often uses بعدما
• MSA commonly says إلى البيت
• MSA shows the formal -تُ ending in fully vocalized writing
• Egyptian colloquial usually drops those formal endings in normal writing and speech

So the Egyptian sentence is the natural everyday spoken-style version.