摘要:语法: 被动语态:句子的主语是谓语动词的动作的承受者或者主语是动作的对象.因此只有及物动词才有被动语态.如: English is spoken by many people in the world. 世界上的许多人讲英语(英语由世界上的许多人讲). 句中的English就是动词speak的承受者.当要强调动作执行者的时候.用介词by加上这个动作的执行者来表示就可以了.如句中的by many people结构. 被动语态的构成: be + done .各种时态由be 表示.如: Our classroom is cleaned every day, but it wasn't cleaned yesterday. It will be cleaned by Group1 tomorrow. 我们的教室每天都打扫.但昨天没扫.明天由第一组清扫. 1a中的被动语态是由情态动词should + be +done 组成.1. I think teenagers should be allowed to go out with their friends every night. 我认为应该允许青少年每天晚上和朋友们出去.

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