一般过去时的被动语态
I.定义：表示过去某一时间的被动动作或过去经常性、习惯性的被动动作，无需说明动作
执行者时可省去
“by +
动作执行者
”。II.结构：一般过去时的被动语态：
1.肯定结构：
主语+ was / were +
及物动词的过去分词
+ by +
动作执行者
Eg：The teaching building was built six years ago.
这座教学楼建于六年前。
练习：①( ) Many trees and flowers ___________ in our school last year.
A. plant B. planted C. have planted D. were planted
注意：was, were
的使用由主语的单复数形式而定，主语为第三人称单数名词、代词或
I时用was,主语为复数名词、代词
they
或you时用were
。2.否定形式：主语
+was / were + not +
动词的过去分词
Eg：The window was not broken by him.
窗玻璃不是他打碎的。
疑问形式：
was /we ...