Period Three　Grammar & Writing

单元语法--复习被动语态

课文原句感知

1.In Europe，where it began，carnival was followed by forty days without meat.

2.As time passed，however，the carnival period was extended，so that it began just after Christmas.

3.Men were not allowed to wear masks at night; and they were not allowed to dress up as women.

4.Today，carnival in Venice is celebrated for five days in February.

一、被动语态概述

语态是动词的一种形式，用以说明主语与谓语动词之间的关系。英语的语态共有两种：主动语态和被动语态。主动语态表示主语是动作的执行者，被动语态表示主语是动作的承受者。被动语态是动词的一种特殊形式，一般说来，只有需要动作对象的及物动词才有被动语态。汉语往往用"被"、"受"、"给"等词来表示被动意义。

二、被动语态各时态的构成

时态 主动语态 被动语态 一般现在时 do/does am/is/are＋done 一般将来时 will/shall＋do will/shall＋be＋done 现在进行时 am/is/are＋doing am/is/are＋being＋done 一般过去时 did was/were＋done 现在完成时 have/has＋done have/has＋been＋done 过去完成时 had＋done had＋been＋done 将来完成时 will/shall＋have＋done will/shall＋have＋been＋done 过去进行时 was/were＋doing was/were＋being＋done

The classroom is cleaned by us every day.

教室每天都由我们打扫。(一般现在时的被动语态)