Our success consert Next week, my family will perform a success concert. We will do it together, to show the best way of doing a concert. Today, I'm going to the supermarket with my sister, to get some materials that we need. Then, I must go to a shop that sells decorations, to arrange some things for the concert. Tomorrow, I'm going to send the invitations to our friends. Then, we will make the final arrangements.

have done and did what's the difference between ( I have done my work) and ( I did my work) ?

First notebook entry: Introducing myself I look forward to improve my english and hope to make freinds from around the world =)