how can i say "gírias" in English?

February in 2014 Currently I'm studying a lot of things in my university in the engineering course and in my country like many others has a government plan called CSF. In this plan we can do intercambio during one year in other countries so for this I need English Test called TOEFL, so I need help of you guys in the italki.

What is the difference between "learned" and "learnt" ?

How I have to use the commas in English "," I have doubts with the use of commas "," in English? Can you help me? Give some example if possible, thanks!

Help me with "HAVE" Hi there I am with very difficult to understand the use of the "HAVE" I understand the use the verb "to have" :D but I'm confuse when have is auxiliar example: I've / You've I've done I've become help me with some explications please ?

Learning propositions Hi there! Today I'm studying the propositions At / In/ On It's very difficult for me and I asked help for some friends at italki Example: 1. I am walking inside the mall and my friend call me outside the mall. So he ask me: Where are you? And I say: I'm IN the mall dude! 2. I am in(or at?) my home and I'm watching TV ON my couch. 3. My books are ON the table but the candy is IN the box and I am at home. (correct me if I made some mistake please)

Olá.. Olá, sou novo no Italki.com e somente agora estou entendendo melhor como ele funciona. Também gostaria de conhecer novas pessoas por aqui! Quem desejar me seguir e ser meu amigo, aceitarei de bom grado e seguirei também! E para aqueles que tiverem dúvidas ou interesse em aprender meu idioma: Português (Brasil), ficarei feliz em ajudar em tudo que puder! :D Hello I am new at Italki.com and only now I am understanding better how it's works. Who wishes follow me like a friend I also follow (: Those who wants to know and learn Portuguese (Brazil) I'll be happy in help them. :D I needs help learning English because I'm beginner in this. (:

The first day! My first day in ITALKI was very good, I made some new friends. I already learn many things in English, I will hope to learn much more! In my country is very important to know other languages, especially English. I am a brazilian boy and I know a lot about the rules of grammar and pronunciation of my native language, Portuguese (Brasil), so if someone needs help to learn Portuguese, just say! :D

Hi there! I'm a university student and I would like to learn and improve new languages, to know new cultures and peoples. I'm 19 years old and I don't have car or my own house, but I have a great family, thanks God. I have a dog, his name is Krypton, like the superman's dog. I love to practice sports in special soccer ball.