‌小升初英语作文中常用的词组和表达‌包括：

• ‌自我介绍‌：Hello, my name is [Name]. I am [age] years old. I enjoy reading and playing basketball. My favorite subject is science. There are three people in my family. My best friend is Lucy‌。
• ‌书信写作‌：Dear [Recipient], How are you? I’m writing to thank you for helping me with my English. Last month, I couldn’t speak fluently, but your advice made me confident. Now I practice every day. Thank you so much! Best regards, [Your Name]‌。
• ‌看图写话‌：In the picture, there is a girl planting a tree. She is wearing a red hat and smiling happily. This tells us planting trees is important for the Earth‌。

这些词组和表达在小升初英语作文中非常实用，能够帮助学生在写作时更加流畅和准确地表达自己的想法。通过掌握这些常用表达，学生可以更好地应对小升初英语作文的写作要求。