글을 검토해보니 몇 가지 수정이 필요해 보입니다. 수정된 버전을 공유해드리겠습니다:

One day I woke up in the morning with a mermaid tail instead of my two legs. I didn't know what had happened. I felt curious about how the mermaid tail got there and how long it would last.

I told my mom that I wasn't feeling well, and my mom told the teacher. So I didn't go to school that day and I felt glad but sad because at school I play more than study, but at home I have to do a mountain of homework. Before doing homework, I happily watched TV and got in trouble with my mom. But I said I couldn't sit down in a chair because I didn't have legs, but I could lay down to watch TV. After that, I told my mom to drive to a secret beach that only a few people knew about to see if my mermaid tail would disappear when it touched the seawater. But it didn't, so I swam at the beach until it got dark.

The next morning, the first thing I did was to check if my legs were back. And my legs were back! I felt free and I was ready to go to school. The day I had the mermaid tail was a strange and unexpected day. It was very memorable.

주요 수정사항:

1. "2 legs" → "two legs" (숫자는 글로 표기)
2. "will last" → "would last" (과거 시제로 통일)
3. 불필요한 마침표(.) 제거
4. "ant" → "and" (철자 오류)
5. 문장 부호 사용 개선 (쉼표, 마침표 위치)
6. "in the beach" → "at the beach" (전치사 수정)
7. "was___" → "was ready" (빈칸 채움)
8. 불필요한 물음표(??) 제거
9. 단락 구분을 더 명확하게 함

전반적으로 좋은 이야기이며, 이러한 작은 수정들로 더 자연스러운 영어 표현이 되었습니다.

- claude ai