1. He bought a new book yesterday.
2. My father asked about my study yesterday.
3. I was ill yesterday.
4. One day, a fox met a dog.
5. This book cost me 5 dollars.
6. I stopped talking when the teacher came in.
7. I did my homework at nine o'clock yesterday.
8. I took my mother to my classroom last Monday.
9. I saw a plane when I went to school yesterday.
10. We saw a bird in the tree.
这些句子涵盖了不同的时态和场景，是学习英语过去式的良好示例。通过这些句子，可以更好地理解和掌握动词过去式的用法。
