Well, yesterday, my english's teacher gave a couple of wraitings, I had made two or three weeks ago. And there were very bad. My problem is that I write English ¿thinking? in Spanish, and that is the issue.

I don't know how to improve my ¿written english?. I am studying in an EOI ( Escuela Oficial de Idiomas) and I am in the first course of B2 (european frame of reference for lenguages). We must use present perfect, past perfect and the passibe because that grammatic is in the list of topics. We have to write assais whit an especific structure and  ¿to follow? ( In spanish we use double question mark) rules. 

I am going to write more often because I will take my exam in two weeks. 

Thanks a lot for your help!