Not exactly!

First of all you need to work backward, so:

Ali´yi tanıdığımı anladığında söylediklerinin duyulmadığını sandığı belliydi.

Call the underlined a

a belliydi = it was obvious that a

That is the main clause.

Another hint:

subj obj verb -> obj which subj verb (in English)

subj obj verb -> subj + -(n)in verb + -dik+ POSS obj

when you work reversely, you need to restore:

subj + -(n)in verb + -dik+ POSS obj -> subj obj verb

a may be difficult for you to decode because:

subj obj verb -> subj + -(n)in verb + -dik+ POSS obj

work the following way sometimes:

gitti = he has gone (no object here and subject is not given explicitly but we know that it´s 3rd grammatical person he/she/it)

gittiği = (the fact) that s/he has gone

gittiği belliydi= (the fact) that s/he had gone was obvious

or

gittiği belliydi= it was obvious that s/he had gone

the a is a similar form above

Ali´yi tanıdığımı anladığında söylediklerinin duyulmadığını sandığı belliydi.

Now say the underlined is b

b sandığı belliydi. = it was obvious that s/he thought that b

Can you proceed from there?

 That I knew Ali

OK... si++ and I were writing at the same time. Si started from the end, I started from the beginning. You just have to do the middle!

I know it´s not correct and it doesn´t make sense, but I worked hard for it and I think I understood the method. What I can´t understand is söylediklerinin (what is the plural suffix doing here?) and the noun states in söylediklerinin and anladığında.

I think you´re doing good but need to work out a bit more.

Here´s some explaination for the bits which are confusing for you:

Verb + -diğinde = when V+ing or upon V+ing or at the time of V+ing

anla-dığında = at the time of realising that ... or

anla-dığında = when s/he realised that ...

V+-dik+POSS = what ( or things that) (the person of POSS) V where POSS=possessive suffix

söyle-dikler-i = what s/he said or the things that s/he said (notice -i possessive suffix is used for 3rd person he/she/it)

First of all Thank you so much to Si and Marionin for your great support and willngness to help people like me who are putting some effort to learn Turkish....Thanks a lot and Keep it up... Finally I was able to put it together again which took me decades because when I was doing it I studied, what you had explained and what I had with me from other sources, again and again. At times it was frustrating, I thought Oh! Leave it man...but I thought again and took a resolution that untill and unless I get it right I won´t leave it because I knew that if you want to overcome your fear face it as if its your eternal enemy 

 so here I go again with my version of it...

Ali´yi tanıdığımı anladığında söylediklerinin duyulmadığını sandığı belliydi.

It was clear that he thought what(ever) they said was unheard (not heard) when he figured out that I knew Ali.

How is it? Please give me your feedback. Waiting. Thanks

Almost!

I will fix it with just a small touch!

It was clear that he thought what(ever) they he said was unheard (not heard) when he figured out that I knew Ali.

It should still be "s/he" not "they" and you need move the underlined part like this:

It was clear that he thought what(ever) they he said when he figured out that I knew Ali was unheard (not heard)  .

Hi Si

Is there any problem TC today as m neither able to see my post which I posted around 12:15 today nor yours which you posted few minutes back ....but its showing below mini chat( always shows here only) on the exteme right of the homepage of TC. What should I do to see it?

If possible could you copy paste it as a new post that I can see it.

Thank you.

 I saw it now...

Why I can´t see my posts????????this is a pain? Is anyone around here who can solve this?

It´s fine on my pc. So I will leave it as it is. I PM´d my post to you without any text formatting!

Cheers!