在高中英语学习中，短文改错是一项重要的练习，它能够帮助学生提高语法知识和语言表达能力。以下是一道高一阶段的英语短文改错题目及其答案解析。
短文：
My name is Tom. I am a high school student. Last weekend, my parents and I went to visit my grandparents in the countryside. We took the bus early in the morning. The bus ride was very comfortable and we enjoyed the beautiful scenery along the way. When we arrived at my grandparents' house, they were already waiting for us at the door. My grandmother cooked a delicious lunch for us. After lunch, we helped them clean their garden. It was a great fun to work together. In the evening, we had a big dinner with my uncles and aunts. We talked about our life and laughed a lot. Before we left the next morning, my grandfather gave me a book about history. I felt so happy because it was my favorite subject.
短文改错：
1. 第一句中的“student”应改为“students”，因为这里指的是Tom自己以及他的同学或朋友，使用复数形式更合适。
2. 第三句中的“bus”前应加“a”，因为这里描述的是乘坐一辆公交车。
3. 第四句中的“was”应改为“were”，因为主语“we”是复数形式。
4. 第六句中的“their”应改为“our”，因为这里指的是“我们的花园”。
5. 第七句中的“a great fun”应改为“great fun”，因为“fun”本身是不可数名词，不需要加不定冠词“a”。
6. 第八句中的“aunts”应改为“aunt”，因为这里提到的是Tom的叔叔和一个阿姨，不需要用复数形式。
7. 第九句中的“Before we left the next morning”应改为“After we left the next morning”，因为根据上下文，应该是离开之后才提到爷爷给书的事情。
8. 第十句中的“because it was my favorite subject”应改为“because it is my favorite subject”，因为这里描述的是现在的感受。
通过这样的练习，学生们可以更好地理解英语语法结构，并且能够在实际应用中避免类似的错误。希望同学们能够认真对待每一次改错练习，不断提高自己的英语水平！
