I would like to share something about gerek. In question sentences you can use a difference structure with gerek.

For example:

• Telefonumu almam gerekiyor.
• When you will write this sentence as a question, you will probably write:Telefonumu almam gerekiyor mu?, which is the normal question structure.
• But you can also use this: Telefonumu almama gerek var mı?, this is a very common structure in Turkish.

Another example:

• Gitmem gerek. (I must go.)
• Gitmeme gerek var mı? (Must I go?), to which you can answer as "evet, gerek var" or "hayır, gerek yok".

Thank you, srhat, for your participating in this long thread which in the beginning was ment to be just a quick question.

I understand these structures are not needed most of the time but it´s good to know them. I remember just recently having wondered how to express something like this.

So, if var and yok are used, gerek must be a noun here.

Yes, you´re right. Gerek is both noun and verb. But it is not used separately in the meaning of "necessity", it is just used in constructions like gerek var/yok etc. I don´t know why, but we use "gereklilik", which is formed by turning gerek into an adj. by adding -li (gerekli) and then into a noun again by adding -lik (gereklilik), instead of it.

Good answer.. but you should have realized that my question was not meant to be answered, it was meant to promote critical thinking...by the way, if you must know, I am a native speaker of Turkish as well..

Well, I know you don´t need that answer. But don´t forget that this page can be viewed by anyone, so I wrote that for future readers of this page as I haven´t encountered anything about comparison of -ecek and -dik participles. You wrote "Do you think, for example, ne yaptığımı gördü and ne yapacağımı gördü could be of the same meaning just because their predicates both are past tense?", but didn´t mention why they are not in the same meaning, so I wanted to write why.

There is nothing to do with being a native speaker here. Maybe you are taking it personal, because I quoted your message in that answer. I quoted, because it is related to your message. So please don´t take it personal.

srhat, welcome to the forums.. enjoy it.. 

thanks.