Mehraba !

I'm a new learner, my name is Cristi, 26 years old guy from Romania. My yahoo id is acpopa2002 and I would be very glad if you would give me your yahoo ids or just add me on your yahoo list, so we can talk and be friends!
I like this site very much and find it very usefull!

ThanX and take care,
Cristi

Yes, others explained it correctly. The -arak -erek suffix applies only to verbs. Therefore it doesn't apply to araba or otobüs which are nouns. You can identify verbs by looking whether or not they have the -mek, -mak version.

These are verbs as you can see from the infinitive suffix (-mek, -mak):
yürümek - to walk
koşmak -to run
gülmek -to smile

Now you that suffix and it makes adverbs out of these verbs:

yüyüyerek
koşarak
gülerek

An adverb is a word that tells us in which way an action was done.

Here are examples:
Okula yürüyerek gitme, otobüsle git.
Ahmet koşarak geldi.
Çocuk gülerek gitti.

and this is anther examble
sevinçle koşarak eve gitti