i am just learning turkish and dont understand some of the rules

the following sentence

seninle konusmayi ozledim

can someone explain to me why the word is

konusmayi

and not konusma

thank you in advance
dd143

Because konuşma is the direct objet of özledim.
As in turkish vowels don't go together, they put the buffer letter y in the middle to keep them apart.
So, to know the direct objet, you have to ask 'what did I miss?'. Here the answer is 'talking with you (seninle konuşma + y +ı özledim).
You can also see it in "Seni özledim" (sen + i özledim).
I hope it helps.

thanks for you help...... does this rule apply all the time........

Do you mean the direct object? If so, no, you use it when you talk about a definitive object.
In turkish there's no article, so objects are undefined. If you talk about a defined one, you use the direct object (or also called accusative case).
Example:

- Bardak ver. (Give me a glass)
- Bardağı ver. (Give me the glass)

thanks for you help... much appreciated