Köpek oynuyor, kedi ise uyuyor.

Here, ise adds contrast. It is similar to whereas, while, or as for in English.

So the sentence is not just giving two facts. It is setting them against each other:

• Köpek oynuyor — the dog is playing
• kedi ise uyuyor — whereas the cat is sleeping

Yes. You could say:

• Köpek oynuyor, kedi uyuyor.

That is still correct. Without ise, the sentence sounds more like a simple statement of two actions. With ise, the contrast is clearer and more deliberate.

In this sentence, ise is being used as a small contrast marker after the noun.

So:

• kedi ise = as for the cat / whereas the cat

You may also come across forms where it is attached more closely in other contexts, but for a learner, kedi ise is a very natural and clear way to understand this structure.

-yor is the Turkish present continuous ending. It usually corresponds to English is ...-ing.

So:

• oynuyor = is playing
• uyuyor = is sleeping

Depending on context, this form can sometimes also describe something currently going on in a broader sense, not just at this exact second.

Start with the dictionary forms:

• oynamak = to play
• uyumak = to sleep

Remove -mak/-mek to get the stem:

• oyna-
• uyu-

Then add the present continuous form.

Results:

• oyna- → oynuyor
• uyu- → uyuyor

A useful detail:

• in oyna-, the final a drops before this ending, so you get oynuyor, not oynaıyor
• uyu- becomes uyuyor

This is a very common pattern with Turkish verbs.

Turkish often does not use subject pronouns unless they are needed for emphasis or clarity.

Also, in the third person singular, the verb form itself can already mean:

• he is playing
• she is playing
• it is playing

So oynuyor by itself can mean he/she/it is playing.

In this sentence, the subjects are named directly:

• köpek = dog
• kedi = cat

So no pronoun is needed.

Turkish is often called SOV, but the more important idea is that the verb usually comes at the end of the clause.

Here, each clause has no object:

• Köpek oynuyor
• kedi ise uyuyor

So the verb is still in its normal clause-final position. There is just nothing between the subject and the verb.

Turkish does not have articles like English the and a/an.

So:

• köpek can mean the dog, a dog, or sometimes dog in a general sense
• kedi can mean the cat, a cat, or cat, depending on context

If Turkish wants to clearly express a/one, it often uses bir.

The comma separates the two clauses and makes the contrast easier to read:

• Köpek oynuyor
• kedi ise uyuyor

Because the sentence compares two subjects doing different things, the comma feels very natural here.

ö does not have an exact English equivalent.

A good approximation is:

1. make the vowel sound of e in bed
2. round your lips as if you were saying o

That gives you something close to Turkish ö.

So köpek is approximately:

• kœ-pek

In standard Turkish, the stress is usually on the last syllable:

• kö-PEK