Loving this break down of common suffixes I also am glad you think of helpful topics like this. I will be refering back to it alot I am sure. Could I request something as well? If you think its relavent, will you also explain the suffixes -erak/-arak which have to do with "gerunds of state" or something. Pretty please?

The suffix -gan [-gen,-kan,-ken ]

This suffix make some verbs adjectives.

FORMULA ;

VERB STEM +  -gan [-gen,-kan,-ken ]

saldırmak = to attack -----> saldırgan [agressive, offensive]

sürünmek = to creep, to crawl ----> sürüngen [ reptant,creepy ]

iletmek = to pass ----> iletken [ conductive ]

yapışmak = to stick, to adhere ----> yapışkan [sticky,adhesive ]

Is it applicable to all verbs???

Nope! Nope! Nope!

The -(i)k suffix in dile-k is not -ek suffix but the same suffix as in:

kes-ik

del-ik

yörü-k

büyü-k

tanı-k

san-ık

iste-k

dene-k

 No, It is not applicable to all verbs. [unfortunately]

 I am not relying on one grammer book as you do. Seems like you are mixing apples with pears. Its quite simple , I am suprised that you are having trouble understanding it.

Dilemek = to wish

Dile [verb stem]

Dile + k [wish]----> only -k comes because the stem verb ends with VOWEL !

thats so simple..

note that I am not adding -ke , i am adding only -k !

So, how would we decide a particular verb if we want to use this formula??? 

Now I know why are you so stubborn on your claim Si++, its because I mishighlighted the suffixes ; the right way should be as follows ;

Korkmak = to fear -----> Kork-ak ----> coward

Dilemek = to wish -----> Dile-k -------> wish

Kapamak = to close ----> Kapa-k -----> lid, cover

Yatmak = to sleep ------> Yat-ak -----> bed

this will end the debate i guess..you cant be still oppose ?

 You will just know the particular ones Hindistan..sorry..there is no rule to decide which ones will take this suffix..

 GERUNDS OF STATE [ DURUM ULAÇLARI] --> - [y] arak , - [y] erek

it gives the meaning like "by doing ", with doing "

FORMULA IS ;

VERB STEM + [y--> if needed] + ARAK or EREK [takes one of these according to the last vowel of the word stem ]

GÜL        +   EREK ---> Gülerek [ by smiling ]

Ağlayarak eve gitti ----->He/she went home [by] crying ---> As you see, this suffix explains the state  of act , how did he /she go home ? By crying

Gülerek cevap verdi bana ---->

by smiling + answer + gave + to me -----> He/she has given me answer by smiling

Müzik dinleyerek ders çalışırım.----> I study by listening to music.

Bahçede konuşarak yürüyorlardı ---> They were walking by talking in the garden.

Zevk alarak Türkçe öğreniyoruz ----> We are learning Turkish by enjoying [it]

Kitap okuyarak dinleniyor -----> He is relaxing by reading book.

We can´t. That´s the difference between conjugating existing stems and deriving new ones from them. You can add for instance the dative ending to any noun but rules about deriving are only guidelines. The use of this knowledge is that when we see a long exhausting word we can try to split it into pieces and then guess what it might mean.