肯 定 句: 主语+ be+ 过去分词 +(by) eg. He is often asked to do this work (by his boss).
否 定 句:主语+ be not +过去分词 +(by) eg. I am not invited to the party (by him).
一般疑问句:Be + 主语+过去分词+ (by)? eg. Are your clothes washed by yourself?
特殊疑问句:疑问词+ be+主语 +过去分词+ (by)? eg. What is this sweater made of?
现以动词give为例,其被动语态的各种时态如下:
式
时
一 般
进 行
完 成
现在
Am / is /are + given
Am/is/are +being + given
Have / has +been +given
过去
Was / were + given
Was / were + being + given
Had +been + given
将来
Shall/ will + given
Shall / will +be + given
Should /would + be + given
含情态词的
Can / may /must +be +given
3、被动语态的用法:
1)当我们不知道谁是动作的执行者,或者没有必要指出谁是动作的执行者时,或者只需强调动作的承受者时,要用被动语态。例如:
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