写小狗的英语作文可以遵循以下步骤和结构：

开头

简单介绍自己和小狗的关系，例如：“I have a dog. He is my favorite pet.”

描述小狗的外貌特征

名字、年龄、毛色、眼睛颜色等，例如：“His name is Peter and he is two years old. His fur is long and white. He has big black eyes.”

描述小狗的性格和行为

小狗的性格特点，例如是否可爱、聪明、忠诚等，以及它的行为习惯，例如喜欢做什么、如何表现等，例如：“He is very lovely. He likes to play with toys and follow me everywhere.”

描述小狗的生活习性

饮食、睡眠、活动习惯等，例如：“His favorite food is meat. He also likes bones. He sleeps a lot during the day and is very energetic in the evening.”

描述与小狗的互动

你和小狗之间的互动和感情，例如：“I take him for walks and he always wags his tail when he sees me.”

结尾

总结对小狗的喜爱之情，例如：“I love my dog very much.”

---

My Favorite Pet

I have a dog. He is my favorite pet. His name is Peter and he is two years old. His fur is long and white, and he has big black eyes. His nose is very good, and he can smell very well. Peter is quite small and weighs about two kilograms.

Peter is very lovely. He is very friendly and loves to play with toys. Every day when I go to school, Peter will show me the way in front of me. If I meet a corner, he will stop and wait for me until he takes me to the school gate. When I get home, I will reward him with a piece of meat or bone, and he will wag his tail at me, which is very cute.

Peter is also very clever. He can learn many tricks and is very obedient. I love my dog very much, and he is not just a pet to me, but also a loyal friend.

---

希望这个例子能帮助你写出一篇优秀的小狗英语作文!