蚯蚓的英语作文写作要点：

开头问候

可以以“Hello.”开始，简单介绍自己。

自我介绍

说明自己是一只蚯蚓，例如：“I'm an earthworm.”

居住环境

描述蚯蚓主要生活在地下，例如：“I live in underground with my friends.”

生理特征

介绍蚯蚓没有眼睛、没有肺等生理特征，例如：“I have no eyes, no lungs and so on.”

说明蚯蚓通过皮肤呼吸，例如：“I breath throgh my skin.”

生活习性

描述蚯蚓的繁殖方式，例如：“My bulge section is where my child was born.”

说明蚯蚓身体粘稠，便于在地下移动，例如：“I'm slimy so that I can move in underground easily.”

年龄与体型

给出蚯蚓的年龄和体型，例如：“I'm 1.5m long and 10 years old.”

可以提及家族中体型最大的蚯蚓，例如：“My great grandgrandpa is the longest and eldest earthworm I have ever seen. He's 3m long and 15 years old.”

生态作用

强调蚯蚓对土壤和植物的益处，例如：“We help the Earth to breath easier.”和“I am good for the plants.”

描述蚯蚓如何通过吞食土壤并排泄肥料来改善土壤质量，例如：“I swallow earth and excrete fertilizer.”

说明蚯蚓如何帮助水分在地下流动，例如：“Everyday I can dug hole as 3m long and help the water go around underground.”

结尾

总结蚯蚓的重要性，例如：“We are gardeners' best friend.”

```

Hello. I'm an earthworm, and I live in underground with my friends. I have no eyes, no lungs and so on. I breath through my skin. My bulge section is where my child was born. I'm slimy so that I can move in underground easily. I'm 1.5m long and 10 years old. My great grandgrandpa is the longest and eldest earthworm I have ever seen. He's 3m long and 15 years old.

We help the Earth to breath easier. I am good for the plants. I swallow earth and excrete fertilizer. We never eat the roots of plants and everyday I can dug hole as 3m long and help the water go around underground, so we are gardeners' best friend.

```

希望这些要点能帮助你写出一篇关于蚯蚓的英语作文。