المسبح بعده مفتوح.

In this sentence, بعده means still.

That is a very common Levantine use of بعد + a pronoun suffix. It does not mean after him here.

So:

• بعده مفتوح = it is still open
• literally, something like it’s yet/still open

This is a very common colloquial pattern in Levantine:

• بعده نايم = he’s still sleeping
• بعدها صغيرة = she/it’s still small
• بعدهم هون = they’re still here

So in المسبح بعده مفتوح, بعده is functioning like still.

The ـه is a pronoun suffix meaning it/he, and here it refers back to المسبح.

Since المسبح is a masculine singular noun, Levantine uses the masculine singular suffix:

• بعده = it/he is still...

If the noun were feminine, you would usually get بعدها:

• المحل بعده مفتوح = The shop is still open
• الباب بعده مسكّر = The door is still closed
• الجامعة بعدها مفتوحة = The university is still open

So the suffix changes depending on what noun you are talking about.

In Levantine, بعده here is usually pronounced baʿdo, not baʿdah.

So the whole sentence is roughly:

• il-masbaḥ baʿdo maftūḥ

A few pronunciation notes:

• ع in بعده is the sound ʿayn
• the ending ـه in this kind of attached pronoun is often pronounced more like -o in Levantine
• ح in مفتوح and مسبح is the strong breathy ḥ sound

So even if you see بعده written with ه, you will often hear baʿdo.

Because in Arabic, present-tense sentences like this usually do not need a verb meaning is.

So:

• المسبح مفتوح = The pool is open
• المسبح بعده مفتوح = The pool is still open

This is called a nominal sentence. Arabic often leaves out the present-tense to be.

But in the past or future, you would use a verb:

• كان المسبح مفتوح = The pool was open
• رح يكون المسبح مفتوح = The pool will be open

So the lack of is is completely normal.

Because it describes المسبح, which is masculine singular.

مفتوح means open, and it agrees with the noun it describes.

Examples:

• المسبح مفتوح = masculine singular
• البنت مفتوحة؟ would not normally be used because مفتوح/مفتوحة is used for things, not usually people in this sense
• الجامعة مفتوحة = feminine singular
• المحلات مفتوحة = plural

So in this sentence, مفتوح matches المسبح.

The basic sentence is:

• المسبح مفتوح = The pool is open

Adding بعده gives the meaning of still:

• المسبح بعده مفتوح = The pool is still open

So you can think of بعده as adding the idea that the state continues.

Yes. That is also very common in Levantine.

Both of these can mean The pool is still open:

• المسبح بعده مفتوح
• المسبح لسا مفتوح

Very roughly:

• لسا is a very common everyday word for still/yet
• بعده is also common, and can feel slightly more tied to the noun through the pronoun suffix

You will hear both in real speech.

In many situations, they are interchangeable.

Because the sentence is structured as topic + comment:

• المسبح = the topic: what we are talking about
• بعده مفتوح = what we are saying about it

So the sentence means something like:

• As for the pool, it’s still open

This kind of order is very natural in Arabic.

You could also hear different word orders in conversation for emphasis, but المسبح بعده مفتوح is a very normal way to say it.

ال is the definite article, meaning the.

So:

• مسبح = a pool / swimming pool
• المسبح = the pool

That is why the sentence means The pool is still open, not just A pool is still open.

In Levantine, that would usually sound incomplete or unnatural for this meaning.

For still, the common pattern is:

• بعده for masculine singular
• بعدها for feminine singular
• بعدهم for plural

So you would normally say:

• المسبح بعده مفتوح

not:

• المسبح بعد مفتوح

The attached pronoun is an important part of this structure in Levantine.