被动语态课件.ppt

被动语态
被动语态基本用法
当句子的主语是动作的执行者时，谓语的形式是主动语态。当句子的主语是动作的承受者时，谓语要用被动语态。被动语态由助动词be+过去分词构成，时态通过be表现出来。
He has to look after the little baby.
主
谓
宾(受动者)
The little baby
has to be looked after
by
him.
改为被动语态
Tom will clean the room tomorrow.
主
谓
宾(受动者)
The room
will be cleaned
by
Tom
tomorrow.
His brother washes bowls every day.
主
谓
宾(受动者)
Bowls
are washed
by
his brother
every day.
各种时态的被动语态构成
1）一般现在时：You are invited to do this.
2）一般过去时：The story was told by her.
3、情态动词：The rubbish can be put into the dustbin over there.
看一看 想一想
make shoes in that factory.
主语+及物动词+宾语
Shoes are made (by them) in that factory.
一般现在时：
S(主语）+am/is /are +过去分词
变为被动语态
2. They bought ten computers last term．
Ten computers were bought (by them) last term.
一般过去时：S+was/were +过去分词
3．Amy can take good care of Gina ．
Gina can be taken good care of by Amy.
情态动词：
S+ can/may/must/should + be+过去分词
各种时态的被动语态构成
一般现在时：
一般过去时：
情态动词：
S+am/is /are +
S+was/were +.
S+ can/may/must/should + be+ .