一般过去时被动语态结构：
肯定句：主语+was/were + 过去分词
否定句：主语+ wasn't/weren't + 过去分词
一般疑问句：Was/Were+主语+ 过去分词
特殊疑问句：特殊疑问词+一般疑问句

一般过去时被动语态例句：

The apples were bought in the supermarket.
苹果是在超市买的。
The fish were caught by Mr Green.
这些鱼是格林先生抓的。
The classroom was painted white by the students.
教室被学生们涂成了白色。
The products weren't made in Japan.
这些产品不是在日本产的。
Was the bike painted red?
这辆自行车被涂成红色了吗？
When was the sports meet held?
运动会是什么时候举办的？

同时须搞懂的知识：
一般将来时的被动语态