在高考英语写作中，介绍信是一个常见的题材。

以下是一些常用的句型和表达，可以在写介绍信时参考使用：

1. I am writing to introduce myself and express my interest in...

2. I am writing to introduce my friend/colleague, who is interested in...

介绍自己/他人：

1. Let me introduce myself. My name is... and I am currently a student at...

2. I would like to introduce my friend/colleague, whose name is... He/She is a... and is interested in...