Argh~ English!

I've been learning English for years, but it still seems difficult to me to communicate in English. I encountered this site by chance<strike>,</strike>  and I like it very much. Hope I can contribute as much as I can learn from here:)

Feel free to check my grammatical errors! Thanks~

Excellent!

The interesnting meeting

Today our school held a meeting to teach us to [OR how to] sing our school's music. The music is so moving, and we sang following our teacher very loud and with passion. It was fun. <strike>And</strike> Then our teacher let us sing it <strike>of our own free will</strike> on stage all on our own <strike>appearing on the stage</strike> . Many students sang their <strike>nice</strike> song well. <strike>A</strike> [the A is crossed out but that's hard to see] One girl even danced on the stage. It was<strike> such a</strike> impressing and interesting . I will never forget it <strike>that</strike>!

AYOUB's notebook entry: Sep 13, 2010

Why <strike>are</strike> does everybody hate the begining of the school year ??

"Welcome to my office" is probably the phrase you're looking for. You would say it when someone enters. "You are very welcome to my office" could mean the same thing but implies that the person is welcome to use your office any time. It would be inappropriate to use the past tense (welcomed) in these cases. You might later say, "I welcomed John to my office today and he didn't respond." Or something like that. Hope it helps.

First notebook entry: Introducing myself

My name is Steve, I<strike>'m</strike> live<strike>d</strike> in Xiamen, China. I'm forty. I have a son and Iove him very much.
In my work I frequently <strike>usually </strike>use <strike>in</strike> English, but r<strike> I</strike>eally [OR then I] forget everything that I learned, so <strike>had leart</strike><strike>,So </strike>I must relearn it.

Welcome to italki.
A few problems but not bad. 
The problem that almost every Chinese member has is the punctuation and spacing. There is always a space after a period (.), comma (,), question mark (?), exclamation point (!), etc. The next sentence (but not the next phrase - as in after a comma) always starts with a capital letter. You would do well to attach a note to your computer to remind yourself of that so that it becomes easy to do.

Today's challenging

Hello, everyone.
Today, I tried to correct another's entry. I don't if know my corrections were of help, but it <strike>these </strike>became very helpful for me <strike>myself </strike>!!
Tommorow is my son's 10th birthday, so <strike>that </strike>I have to get sleep right now!!
Good night^^

Small changes. Very well done.

Xavi's notebook entry: Sep 07, 2010

After few days without being able to connect to Italki [OR without having a connection to] I have returned :) . These last  [few] days have been very busy <strike>days</strike>. And unfortunately the<strike>se</strike> <strike>following</strike> next two weeks <strike>goes in the same way. </strike>will be the same OR will also be very busy.
I hope, at least, to write <strike>any</strike>something every day in my blackboard. But this is only a wish.

"Brazil was an exploitation colony"

I guess that works but I think "an exploited colony" would work better.