I,m learning english in university.But I think, I need help.

If you want some excellent writings to compare, to learn sentence structure & word use, this link will take you to a site that I believe has several articles that appear in both languages (and 263 others):

Languages
http://watchtower.org/languages/languages.htm

(I only speak English, so can't be personally sure if all that are in other languages are duplicates of those that appear in English, but I strongly suspect that all or most are.)

E-mail me if you ever need help and I will help you learn! =)

My dad immigrated from Cuba and had the troubles learning English also if you need help IM me an "caballerodelfuego2000" I would be happy to help

Learning English is about communicating with another person, i.e. being able to have a conversation with another person. So get with another person and practice questions and answers, in different situations you might come up against. e.g. If you meet a new person, how will you introduce yourself and say Hello? If you want to talk about a soccer match on TV, how will you express your opinions? If you want to buy some food at a local store, how will you ask them to pack it up for you? Learn words and sentences you like first, then choose the difficult ones. You must learn to speak aloud. The very act of making the words leave your lips will add to your confidence. Reading and listening are very good, but speaking is the most important thing for vocabulary and pronunciation.

A decade ago to learn English, you had to attend costly English classes or purchase course material like tapes and books. Now you can learn English for free from the comfort of your home using the Internet. The BBC and the British Council offer a number of on line courses, which teach written and spoken English. You can also improve your English by watching television programs and reading English newspapers. For more information, visit http://tinyurl.com/qnzpt

There are many speakers at http://www.sharedtalk.com that can help you.