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What do you think of the environment in our school?
Be + 过去分词
A. I am _____________. The environment in our school is just so so.
B. Some students always _____________ away their paper on the ground.
C. Rubbish _____________ away in our school.
D. Textbooks ______________ on the ground in the classroom by our students.
shocked
throw
is thrown
are put
被动语态（Passive Voice）
小组讨论并完成2个任务
主动语态（active voice）和被动语态（passive voice）的区别：
Some students always throw away their paper on the ground.
__________语态可以知道某人或者某物执行了动作
主动
小组讨论并完成任务
主动语态（active voice）和被动语态（passive voice）的区别：
Rubbish is thrown away in our school.
Textbooks are put on the ground in the classroom by our students.
当不知道或者没有必要指出动作的执行者时，用_______语态（见句子C）；
如果强调动作，可以在句子中加入_______________短语（见句子D）
被动
by+ sb.
Some students throw away their paper.
主语
谓语
宾语
The paper is thrown away by some students.
主语