Good questions Dear Deli,

I have done typing error above by putting "Onun" i will change it now. Sağol.

1. The reason I put "dan" is that the verb " birisinden bir seyi beklemek " requires ablative case, to expect or wait something from someone. In other words because it is "from someone" we need to put "dan,den"  such as;

Senden bir haber bekliyorum ---> I am waiting a news from you.

Senden bu sözleri beklemezdim ---> I wouldnt expect [to hear] these words from you.

but in other cases such as ;

Seni bekliyorum ---> I am waiting for you.

Bunu bekliyordum ---> I was expecting this.

                               I was waiting for this.

and;

If the sentence was ;

"Her telling me the truth made me happy" ; --->

Onun gerçeği söylemesi beni mutlu etti. ---> So "un" here would be "genitive"

Onun gerceği soylemesi ---> Her telling the truth.

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2. yes, aferin sana !  you are right, I forgot to seperate "s" , as "s" is acting like " buffer" to combine two wovels here.

in "soylemesi"  soyle + me + s [buffer s] + i [possesive]

Bravo sana..You again proved how clever you are !! Tesekkurler Deli..

And the final form of the sentence is ;

" I would have expected her to tell the truth "

Onun gerçeği [doğruyu] söylemesini beklerdim.

O [she] + n [buffering n] + dan [ablative] + gerçek [truth, "k" changes into "ğ" ] + i [accusative] + söyle [stem] + me [ suffix that makes verbal noun ] + si [possesive for 3.person] + n [buffering n ]+ i [accusative] + bekle [stem] + r [aorist tense] + di [past] + m [person "I"].

 And this chocolate goes to dear Deli for her great efforts on this complicated sentence.

  Afiyet olsun !

Onun uzun zamandaki aradığı eteğı bulabilecek bir dükkanı tanıyorum...

And the final form of the sentence is ;

" I would have expected her to tell the truth "

Onun gerçeği [doğruyu] söylemesini beklerdim.

O [she] + n [buffering n] + dan [ablative] + gerçek [truth, "k" changes into "ğ" ] + i [accusative] + söyle [stem] + me [ suffix that makes verbal noun ] + si [possesive for 3.person] + n [buffering n ]+ i [accusative] + bekle [stem] + r [aorist tense] + di [past] + m [person "I"].

 And this chocolate goes to dear Deli for her great efforts on this complicated sentence.

  Afiyet olsun !

 Psssst... deli: try söylemesini .. or söylemesine (I always get the last ending wrong unless I check the dictionary in this site) but don´t let tunci see we are working together.