Questions & Answers about Ekibe bağış toplamak istedim; o da katkı yaptı.
Use vowel harmony based on the last vowel of the word it follows:
- After a front vowel (e, i, ö, ü): use de (e.g., ben de, Ayşe de).
- After a back vowel (a, ı, o, u): use da (e.g., o da, Ali da is wrong → should be Ali de because the last vowel of “Ali” is front “i”). Note: For the additive particle, the consonant stays d (never t). The locative case suffix is different (see next Q).
- Additive de/da (“also”) is a clitic written separately: o da, ekip de.
- Locative case -de/-da (“in/at/on”) is a suffix attached to the word: evde (in the house), okulda (at school).
Compare: o da = “he also”; oda (one word) = “room.”