What does it mean when you use ´that (between this and that)´ or ´those (between these and those)´ ?

Do you mean the difference between the words in Turkish?  ´That´ is singular, ´those´ is plural, same as in English

Well on one of the lessons it says that = o , that = şu , those = şunlar , those = onlar ..but what is the difference between the two thats´ and the two those´ ?

bu (this) refers to something near

şu (that) to something further away but still fairly close

and o refers to something even more distant.

I read this in the Teach yourself Turkish book and it helped me to understand it clearly so maybe it will help you too

"something held in your hand is definitely bu, a table on the other side of the room is most cetrtainly referred to as şu and a tree on the horizon is certainly o" - extract taken from Teach yourself Turkish

Hope it helps

Hehe-I was going to give the example ´bu eşim´ but I certainly wouldn´t be holding him in my hand!  

 haha no I guess you wouldn´t, not unless he´s a teeny tiny person that you could fit in your pocket  so I guess that example doesn´t always fit lol

Just wanted to say aswell that the Teach yourself Turkish book in pdf. file format and all accompanying mp3 files was given to me by a very kind TLC member, and I wanted to say a big thank you to them, it´s been such a big help to me.

thanks for the replies! its much clearer now.

what was the Teach yourself Turkish book in pdf. file format that someone sent you? is it on this site at all?

 İs sombody talking about me ? 

Were your ears burning,canım?