Questions & Answers about Komşum dostça davranıyor.
What does the suffix in Komşum mean?
The ending -um is the 1st‑person singular possessive suffix -(I)m, so komşu (neighbor) + -um = komşum “my neighbor.”
Why is it -um and not -im / -üm / -ım?
Vowel harmony. The last vowel of komşu is o (a back vowel), so the possessive suffix uses a back vowel: -um. If the word had a front vowel, you’d get -im/‑üm instead (e.g., evim “my house,” gönlüm “my heart”). With a back unrounded vowel you’d get -ım (e.g., kitabım “my book”).
Do I need to say Benim komşum or is Komşum enough?
Komşum already means “my neighbor,” so benim is optional. Add benim only for emphasis or contrast: Benim komşum dostça davranıyor (ama seninki değil).
Could Komşum mean “I am a neighbor”?
No. “I am a neighbor” is Komşuyum (note the buffer y + personal ending -um for the copula). Komşum (no buffer y) is possessive: “my neighbor.”