I don´t understand how to know difference between Gelecek zaman and Geniş zaman when you want to build sentence with the Future tense. I tried to compare with my language,I´ve been looking for some explanations,but I couldn´t find anything. If you got something,or if someone can explain me difference,I would appreciate it.

Thank´s in advance...

Gelecek zaman = to act an event will be happen in the future

I will go to Istanbul next year

Gelecek yılda Istanbula gideceğim ,

Geniş zaman : To act an hapit you are do it usually or to act an event was happen in the present

I was reading a grammar book

Bir dilbilgisi kitabı okurum

My try as learner

Read that about geniş zaman

http://www.turkishclass.com/turkish_lesson_216

READ about future tense or Gelecek zaman here:

http://www.turkishclass.com/turkish_lesson_20

Thank you so much, nifrtity.

It is past continuous tense (was/were + V + ing), not present.

It should be; I read a grammar book.