精选优质文档-倾情为你奉上Module1 Europe问题解决评价单班级: _ 组名: _ 姓名: _ 日期:2012. _Grammar 1 Passive voice: present and past forms (P5)一.何时用被动语态?1.不知道谁是动作的执行者时; Paper is made from wood. He was wounded in the fight. 2.没有必要或不想指出动作的执行者时; Books and newspapers in the reading room mustnt be taken away.3.强调或突出动作的承受者时; She was heard to move about in her room uptairs. 如果需要指出被动的执行者,可用“by + 动作执行者(宾格)”这一结构。二.主动表被动的几种情形:一、谓语动词用主动表被动的四种情形:(1)某些连系动词主动表被动: look, sound