Saya tidak bisa duduk lama di ruang tunggu klinik karena punggung saya sakit.

Because tidak negates verbs, adjectives, and states, while bukan usually negates nouns or noun phrases.

Here, bisa means can / be able to, which behaves like a verb or verbal expression, so tidak bisa means cannot / am not able to.

• Saya tidak bisa duduk lama = I can’t sit for long.
• Itu bukan klinik = That is not a clinic.

In this sentence, bisa means can / be able to.

So:

• Saya bisa duduk = I can sit.
• Saya tidak bisa duduk lama = I can’t sit for long.

A useful note: bisa can also mean poison in other contexts, but not here.

Usually duduk means to sit or to be seated, not specifically the action of sitting down.

So tidak bisa duduk lama means:

• can’t sit for long
• can’t remain seated for long

If you specifically want sit down, Indonesian often uses duduk based on context, but sometimes the surrounding words make the meaning clearer.

Because lama here describes the duration of the action. In Indonesian, words showing duration often come after the verb.

So:

• duduk lama = sit for a long time
• literally, something like sit long

This is normal Indonesian word order.

Compare:

• menunggu lama = wait a long time
• tinggal lama = stay a long time

It means sit for a long time or sit for long in natural English.

Indonesian often does not need a separate word like for in this kind of expression. The duration word lama already gives that meaning.

So:

• Saya tidak bisa duduk lama = I can’t sit for long.

Because Indonesian noun phrases usually go from the main noun to the word that describes it.

Here:

• ruang = room
• tunggu = waiting
• ruang tunggu = waiting room
• ruang tunggu klinik = clinic waiting room

So the head noun comes first, and the following word(s) narrow it down.

You can think of it as:

• room → what kind? waiting
• waiting room → whose/which one? clinic

Because Indonesian does not use articles like the or a/an the way English does.

So ruang tunggu klinik can mean:

• the clinic waiting room
• a clinic waiting room

The exact meaning depends on context. In this sentence, English would most naturally say the clinic waiting room, but Indonesian does not need a separate word for the.

Because possessors usually come after the noun in Indonesian.

So:

• punggung saya = my back
• buku saya = my book
• teman saya = my friend

This is the normal pattern:

• noun + possessor

So punggung saya sakit literally follows the Indonesian order back my hurts/is painful.

Here, sakit means painful, hurts, or is sore.

So:

• punggung saya sakit = my back hurts / my back is painful / my back is sore

A useful note:

• sakit can describe pain or illness in general.
• Saya sakit = I am sick / ill
• Tangan saya sakit = my hand hurts

Because Indonesian often does not use a separate verb like to be in simple statements with adjectives or conditions.

So instead of saying:

• My back is painful

Indonesian simply says:

• Punggung saya sakit
• literally: my back painful

This is completely normal Indonesian grammar.

Karena means because. It introduces the reason.

So the sentence structure is:

• Saya tidak bisa duduk lama di ruang tunggu klinik
  = I can’t sit for long in the clinic waiting room
• karena punggung saya sakit
  = because my back hurts

Put together:

• I can’t sit for long in the clinic waiting room because my back hurts.

Yes. You can also put the reason first.

For example:

• Karena punggung saya sakit, saya tidak bisa duduk lama di ruang tunggu klinik.

That means the same thing: Because my back hurts, I can’t sit for long in the clinic waiting room.

Both orders are natural. The original sentence simply puts the main statement first and the reason after it.

Not exactly.

• klinik = clinic
• rumah sakit = hospital

So ruang tunggu klinik is specifically a clinic waiting room, not a hospital waiting room.

If it were a hospital waiting room, you could say:

• ruang tunggu rumah sakit

Yes. Depending on context, a natural English translation could be:

• I can’t sit for long in the clinic waiting room because my back hurts.
• I can’t stay seated for long in the clinic waiting room because my back is sore.
• I’m unable to sit for very long in the clinic waiting room because my back hurts.

They all match the Indonesian meaning closely.