关于一篇初中英语作文，帮看一下有什么问题，通不通顺，语法上···

I have a computer, since my father bought it, it became my friend, I can not only use it to study, but also can be used to entertainment, listen to music, play games, make friends. But we can't spend too much time on it because it's bad for our eyes, so we should pay attention on it. Although the computer is small , it has a large wide range of knowledge. Since l had it,l got much knowledge from it, I like it very much, it's also my friend.
天哪！累死我了！他几年级啊！预备还是初一？语法问题很严重！要努力啦！

内容呢

应该有一些语法的错误
be used to后面加动词
词组：pay attention to
应该还有一些。。。。。。。。。。

I have a computer, since my father HAVE bought it, it started to become my friend, I can use it to study,IT can also be used to 换成FOR entertainment,FOR music, AND FOR playING games, makING friends. But more than playing on a bad eyesight, so when they PAY a lot of attention, although it is small in size, however it has a very wide range of knowledge, With it, the study also gave me great help, I am very of like it, it's my friend-computer.
哇，不行了，太多错误，改不过来。最好重新你写一篇吧