This word create definition from previous word. Example: 有的 人- some people. 河里的 - being in river. 我 - I 我的 - My

there are four means in Chinese it depends on its pronunciation but do you know the pinyin in Chinese ? and I can tell you there are four scale if you want to know more about Chinese ,please leave note on italki . I'd be glad to help you solve the problem

There are three different "de"s and all of them are used in different situations. The one you described above can signify possession. So 我的马 would mean "my horse". It can also be used as an associative particle to place in between a noun and an adjective. So 可爱的狗 would mean "cute dog"

I see thanks!

It's grammatically equivalent to our " 's ", but used much more heavily in chinese. you should learn the 是...的 construction to really get a good feel of 的。