"Eu melhoro minhas palavras."

Translation: I improve my words.

[samosborn88]

Can anyone explain why sometimes we need to use the def articles "o, a, os, as" with possessives, and sometimes not? is there any patterns or rules for that?

[Paulenrique]

You may find it useful: http://duolingo.com/#/comment/64947

[ArthurBors1]

Eu uso os atalhos de português, e falo português ! hahaha :)

[inezbraz]

I wrote down "I improve my vocabulary". I would think this is correct too, no?