İ guess it come from ´olmak´?

So what does it actually mean, and what is rule to use those suffixes?

I just looked up olali with  http://www.seslisozluk.net

this is what I found

English - English translation for "olali"

Thank you. Can i get some examples?

Click here to see a lesson with a few examples.

Some notes I have about ´since´

....dan/den beri = since (for)

verb root (y)alı/eli = since verb

verb + past tense + p.e.  followed by verb + alı/eli = ever since verb

İstanbul´a geldiğimden beri sinemaya gitmedim.

(I haven´t gone to a cinema since I came to Istanbul.)

İstanbul´a geldim geleli sinemaya gitmedim.

(Ever since I came to Istanbul I haven´t gone to a cinema) 

Üç yıldan beri sinemaya gitmiyorum

(I haven´t been going to the cinema for 3 years)

or alternatively you can say

Sinemaya gitmeyeli üç yıl oldu

Thank you Henry. How would you translate this:

1.) Ah İstanbul İstanbul olalı
     Hiç görmedi böyle keder

2.) Seni seveli (This is one song´s name)

Poetry and songs can be interpreted in many ways, but here is my attempt, but wait for others to translate as well.

1) Ah Istanbul, since becoming Istanbul

it has never seen sorrow like this

2) Since loving you (Since I loved you)

Because the is no personal ending with the eli suffix, you have to make the decision whether you can use ´I´ in this translation, depending on context.

I wait to see what others think 

Good explanation ! 

Thank you so much Henry 

Namely depending on the person of the main clause predicate.

                   Virane olmuşum seni seveli. ´I was ruined since I loved you.´