As I figured there are several reasons they use these adorable suffixes I mentioned in the title of this post.

1. You´re talking about facts =>

    Example: Kapadokya adı Pers dilinde "Güzel Atlar Ülkesi" anlamına gelmektedir.

2. You want to express must be / has to be / should be in Turkish =>

    Example: Kapı çalıyor. Postacıdır.

3. If you´re speaking thing you uncertain about =>

    Example: Bir tannem acaba şimdi ne yapıyordur?

Please correct me if I am wrong and add more points if there are. I would also appreciate some more sentences as examples.

Thank you so much!

I see... It´s like a statement, something that might not be a well known fact but you personally believe in.

Can you say for example:

Açık renkler güzeldir.

Hayatım heyecanlıydır.

Very useful note PELGIDIUM, thanks.

How could you translate these sentences?

1-

Şu anda dünyada kimbilir neler oluyordur

İnsan vardır, ağlıyordur

İnsan vardır, kara kara düşünüyordur

İşte yine akşam

Şehri sarıyor karanlık

Gece akıp gidiyor sabaha

Dünya her sabah yeniden kuruluyor

Her gün yeni bir başlangıç

Ve umut

Umut İnsanın en son terkettiği duygudur

2-

Sordum sarı çiçeğe ="Annen baban var mıdır?"

Çiçek dedi ="Ey derviş, annem babam topraktır!"

-Yunus Emre-

3-

Zaman dediğin nedir ki, su gibi akıp geçip gidiyor

Yaptıklarımız söylediklerimizle kalıyoruz 

 Yes you can say this

I haven´t got a clue. I am still trying to understand this grammar and figure out the meanings and how it is paired with verbs, adjectives or nouns. Unfortunately I have´t found any clear explanation nor examples.

If you help me out I swear I´ll translate it, I love poems.

Yes, it is a poem.

İ never use -dır, -dir, -dur, -dür.. endings.

What is it about? Can you translate it for me? It would help me to understand this grammar.

Do you have other examples including this suffixes? Maybe another poem or text? Am I asking too many questions?

Yes, I heard that they are not really used in daily language but unfortunately it is a part of the book I am following. I need to make this grammar mine if I want to continue learning. I almost finished the book and it would taste bitter to give up now. I don´t like bitter...

I know that this grammar is not the essence of the language and that it´s hardly used. Even my husband has troubles to make me understand, and he was practically raised here. I am serious about learning Turkish, so I would really like to get a hold of it.

I can only hope there are some brave native speakers out there who can offer me examples, maybe a short text to read or help me out by writing down some situations this grammar may occour. I mean.. when is it used? 

On the other hand, I consider any options and take any advice in count so if you tell me that I should leave this alone, I´ll accept it. For now.

I don´t know fluent English language like you.

It is impossible to learn fluent English language without a good teacher.

Also you cannot learn Turkish language without a good teacher.

You need to read good Turkish grammer books, Turkish novels, Turkish newspapers.

You need to analyze English and Turkish grammar. 

At first, you need to begin Turkish language from your profession and hobbies.

It requires labour.It requires love.It requires ambition.

It takes a long time.

Maybe 10 years.

 They are used in journalism, newscasts and public announcements however.

Here is an example from a wall near the Spice Bazaar:  "İSTANBUL TİCARET ODASI TARAFINDAN GERÇEKLEŞTİRİLMEDTEDİR"  and guess what)   d/tir occurs twice in the same word!

The suffix -tır is being used to express a consistency, for giving extra expression/accent or general/common validity:

Türkiye benim öz memleketimdir

Turkey is (just happens to be) my own country

´Türkiye´nin bunları düzeltmesi lazımdır´ dedi

He said: ´Turkey just has to/definitely has to/ certainly has to make that correct/clean up.

Hükümet çok önemli bir kurumdur, ama herşey değildir

The government is a very important organization, but definitely not everything

Ama, herhalde çok acı çekiyorsundur, yanılıyorsun Aliye

But you must be in much pain/suffer, you are wrong Aliye

Hiçbir politikacıdan bir şey istememişimdir

From none of politica´s İ have ever wanted anything

In speaking language it expresses also strong presumption: (´for sure´

Işin iyidir

Your work must be good

Şimdi yoldadır

He has to be on his way by now

Iyisinizdir

You are surely allright

Biliyorsundur

You must know this/you know this for sure

İ hope to have explained it clearly and İ hope to have used the correct english words.

Thank you so much for the advices and examples. The picture is getting more clear, so hopefully I won´t have any problems.

Melike, your sentences were especially useful, I appreciate that you took the time to write them down. Your English is more than good by the way.

Thanks for your post yilgun, it´s very ispirational. I have already flooded the living room with Turkish books, magazines and newspapers. As soon as I am finished with the grammar book I am going to fight them all.

Probably your English is more fluent than mine, it´s kind of hard to compare them here and there is no need for that.

Don´t worry, you can easily get better without a good teacher. I have never been taught by a native speaker and haven´t taken even one extra lesson besides the classes of high school education. Your grammar is excellent, just keep your eyes and ears open.

Have a nice day everybody!

You are welcome Petra, good luck with learning Turkish !

 Who knows what is going on in the world right now

There are people crying

There are people in deep depression

Look, it is evening once more

The darkness envelops the city

The night flows on towards the dawn

The world is born again each morning

Every day is a new start

And hope

Hope is the last refuge of mankind

 I asked the yellow flower, "Do you have a mother and father?"

the flower replied, "Oh dervish, my mother and father are the earth"

What is this thing you call time, that flows like water

We are left behind just with the things we have done and said.

For  MarioninTurkey,

Thank you very much.

 Typo (either yours or theirs!!)

GERÇEKLEŞTİRİLMEDTEDİR = GERÇEKLEŞTİRİLMEKTEDİR

It is being realised/done/made

This form -mektedir is normally only used in official business language

 You are welcome!