精选优质文档-倾情为你奉上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：( ) 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 +
