Questions & Answers about Şu güzel kızlar kim?
Why does kız take -lar instead of -ler for the plural?
This is because of 2-way vowel harmony. The plural suffix changes based on the final vowel of the word. The word kız has the vowel 'ı'. Words whose last vowel is a back vowel (a, ı, o, u) always take the -lar suffix.
Should the word for 'those' (şu) or 'beautiful' (güzel) also get a plural suffix?
No, and this makes Turkish grammar quite simple! Adjectives and pointing words (like bu, şu, o) do not change to match plural nouns. You just make the main noun plural: şu güzel kızlar.
Could I use o instead of şu for 'those'?
Yes, you could say o güzel kızlar kim? Both şu and o can mean 'that' or 'those'. We usually use şu when we are physically pointing at something nearby that the listener hasn't noticed yet. o is for things further away.
Why doesn't the question word kim (who) have a plural suffix here?
Because the subject (kızlar) is already plural, Turkish doesn't require you to make kim plural too. The language prefers to be efficient and avoids repeating plural markers if it's already obvious from the noun.