Questions & Answers about Makas masada duruyor.
Vowel and consonant harmony govern case endings in Turkish:
- Vowel harmony: masa ends in a (a back vowel), so the locative vowel is a, giving -da rather than -de.
- Consonant harmony: If a word ends in a voiceless consonant (e.g. kitap), -da becomes -ta, yielding kitapta (“in the book”).