Is there any difference in meaning?

gelmek bilmedi He never arrived

gelmedi He didnt come

Is var used in reference to an action also? i thought it was for possessive purposes?

now im all confused

varma = arrival

hmm

in my grammar book it has a NOTE:

saying The verbs 'istemek' and 'bilmek' frequently take a common infinitive as object.

eg: Gitmek istedi. He wanted to go.
Gelmek bilmedi. He never arrived.

So then, at what occassion would one state 'gelmek bilmedi' to produce the meaning of He never arrived?

Im thinking maybe someone says...He didnt know what time to come so ...gelmek bilmedi hehe could that be right?

"gelmek bilmedi" means he couldn't come or he didn't come.

"v + -mek bilmemek" form gives a special meaning to the verb. More or less it would mean the following for the example.

utterance at the present time:
we have been waiting for him to come for a (long) while but he hasn't come yet
or
we have been waiting for him to come for a (long) while and he could come at last

utterance at a past time:
we waited for him to come for a (long) while but he never came
or
we waited for him to come for a (long) while and he came at last.

Thank you si++ is this form used often? what other verbs would use this form frequently if so and might you give some examples? your help is gratefully appreciated.