写作思路：可以先介绍一下自己的过去就是以前的自己是什么样的，然后再说一说现在的自己有什么样的变化等等。
正文：
In the past, my room was very messy and miserable, but I refused to clean it up. Now, I began to take the initiative to clean it up. Ha ha, to tell you the truth, if you don't clean up the room when you are so big, it's really a joke. The only defect is that the wife in the room is too small, but still can accommodate me.
以前我的房间很乱，乱的惨不忍睹，但我都不肯收拾一下，现在的我，开始主动收拾了，呵呵，说实话，长这么大了还不收拾屋子的话实在是让人笑话了，唯一的缺陷就是房间太太太小，但还是能容得下我的。
In the past, I was heartless and free all day, but now I have become a little sentimental, thinking about others. Occasionally, I am moved to tears by a TV play and reciting a book. One thing will entangle me for a lot of time.
以前的我没心没肺，整天自由自在，现在的我变得有点多愁善感，去想别人，偶尔被一个电视剧，背一本书感动流泪，一件事会让我纠缠很多时间。
Now, I still have this temperament, but I have more reason, and I will explain clearly when I have conflicts with my classmates. What I do should be carefully considered. I will not make many mistakes again and will not let others worry. That kind of situation is also very rare.
现在的我，仍然有这种性子，但多了一份理智，和同学闹矛盾也都会讲清楚，干什么事都要慎重地考虑一下，不会再犯下很多错误，也不会让其他人担心，那种情况也很少见了。
Time flies, time flies, and the past time will never return. What we can do is to make ourselves better and let our future self recall the present time without regret or regret. From now on, don't forget to struggle!
岁月匆匆，时光荏苒，过去的时光一去不复返，我们能做的，只有让自己变得更好，让未来的自己回想现在的时光时，不会后悔，不会遗憾。从现在起，不要忘记奋斗！
字数故意写的有点多，楼主可以根据自己情况删一删。好请采纳！谢谢本回答被提问者采纳