关键句型一：一般过去时的句型
1. There was a park near our school.
2. Lots of students took part in the lecture yesterday.
3. I spent my summer vacation in Shanghai last year.
4. The firemen arrived, and soon the fire was under control.
5. Last Saturday evening, I went to the movies with some friends.
6. Soon two policemen in a police car came and arrested the thief.
