V + -sa/-se is called "dilek-şart" (wish and condition) that is it may be used to make conditional (hypothetical) statement or a wish gelse = I wish s/he came (wish) gelse = if s/he came (but s/he didn´t(doesn´t) (hypothetical condition) Now in old Turkish we had a verb called "er-mek" (to be) and we had "er-se" form using -se suffix mentioned above. Over time, "er-mek" became "i-mek" (with it various forms er-di > i-di; er-miş > i-miş; er-se > i-se; er-ken > i-ken; in Uyghur/Uzbek language: er-mez > i-mez = not). Then they all became suffixes: i-se > -se/-sa i-di > -(y)di/-(y)dı/-(y)du/-(y)dü/-(y)dı/-ti/-tı/-tu/-tü i-miş > -(y)miş/-(y)mış/-(y)muş/-(y)müş i-ken > -(y)ken geliyor = s/he is coming geliyor ise = geliyor-sa = if s/he is coming gelir = s/he comes gelir ise = gelir-se = if s/he comes gelecek = s/he will come = s/he has an intention to come gelecek ise = gelecek-se = if s/he will come;if s/he has an intention to come geldi = s/he has come geldi ise = geldi-yse = if s/he has come or geldi = s/he came geldi ise = geldi-yse = if s/he had come (past conditional, non-hypothetical) gel-se = if s/he came (hypothetical) gel-se idi = if s/he had come (past hypothetical) Example: Past hypothetical condition example: 3 dakika önce gelse idi, Ali burada idi. = If he had come 3 minutes earlier, Ali was still here (But he didn´t come and he and Ali couldn´t meet) Present tense hypothetical condition example: 3 dakika önce gelse, Ali burada olur. = If he came 3 minutes earlier, Ali would be here.

Gelseydi: eylem olmamıştır. Yani gelmemiştir. Örnek: Eğer toplantıya gelseydi görüsürdük. ( gelmediği için görüşemedik) Geldiyse: eylemin olup olmadigindan haberi yok.. Örnek: eğer toplantıya geldiyse görüşürüz. Gelmediyse gorusemeyiz.