自我介绍：
　　Hello!Everyone,my name is Siyuan.I am seventeen years old.I am a son boy/girl.I alwayseat snack after school.My favourite colour is bule.My favourite food is hamburgars,ice cream and chicken.I am a good student in the school and I am a good son in my family!
　　This is me!
　　写老师的：
　　Our English teacher, Mrs Wang, is about forty years old. She always wears a pair of glasses. She is very strict with us. When we make a mistake, she often makes us stand up. But we hear that her home is far from our school. Every morning she has to walk to school for forty minutes. And she is never late. Then we come to see that Mrs Wang loves us dearly. She teaches us so carefully.
In fact, she is a good teacher!
　　（你再检查一下有没有语法错误,我刚上初一,才写的这篇作文,不过和这篇不太一样,不过我已经很用心在写了）