第19讲 情态动词的被动语态 -【暑假辅导班】2021年新九年级英语暑假精品课程(人教版)
第十九讲 情态动词的被动语态
【语法聚焦】
一、含有情态动词的被动语态的结构:
含有情态动词的被动语态由“情态动词 + be + 及物动词的过去分词 ( + by... )”构成。
The children should be allowed to go to the movies with friends on Friday nights. 孩子们应当被允许星期五
晚上和朋友们一起去看电影。
Waste paper should not be thrown here. 废纸不应该被扔在这里。
Should it be done by Li Ming? 这件事应该是李明做吗?
二、含有情态动词的被动语态的肯定式、否定式及疑问式
肯定句
主语+情态动词+be+过去分词
(+by...)
All these books could be lent to the students. 所有这些书都
可以被借给学生。
否定句
主语+情态动词+not+be+过去
分词(+by...)
The work needn’t be done at once.这项工作没必要立即做。
These books mustn’t be taken out of the reading room.这些书
不准被带出阅览室。
一般疑问句
情态动词+主语+be
+过去分词(+by...)?
Must the work be done at once?这项工作必须立即完成吗?
特殊疑问句
疑问词+情态动词(+主语)+be+
过去分 词(+by...)?
When should the flowers be watered?应该什么时候浇花?
Who should be asked to answer the question?应该要求谁回
答这个问题呢?
1、情态动词的被动语态结构为:情态动词+be+过去分词; 其时态及句型的变化仅由情态动词完成,“be+
过去分词”部分不变。
Tables can be made of stone. 桌子可由石头制造。
Can tables be made of stone? 桌子能用石头制造吗?(疑问句)
2、含有情态动词的被动语态变为否定句时,应在情态动词后面加 not;变为一般疑问句时,应将情态动词
移到句首。
Waste paper should not be thrown here. 废纸不应该扔在这里。
Should it be done by Li Ming? 这件事应该是李明干吗?
3、含有情态动词的主动语态变为被动语态时,要把主动语态中的宾语变为被动语态中的主语;主动语态
中的谓语动词变为“情态动词+助动词 be+过去分词”;主动语态中的主语变为介词 by 的宾语,放在句尾
(如果不强调动作的执行者,by 短语常可省略)。
Parents should allow fourteen-year-olds to choose their own clothes. 父母应该允许十四岁的少年选择他们
自己的服装。
→Fourteen-year-olds should be allowed to choose their own clothes(by parents).
【过关检测】
一、单项选择
1
1.A lot of teenagers think as they are older and wiser, they ________ to make their own decisions.
A.should allow B.shouldn’t allow
C.should be allowed D.shouldn’t be allowed
2.Children under 12 years old________ride sharing bikes. It’s too dangerous.
A.shouldn’t allow to B.shouldn’t allow
C.shouldn’t be allowed to D.shouldn’t be allowed
3.Your homework must be ________ this morning, or you can’t hand it in on time.
A.finish B.finished C.finishes D.finishing
4.—Tom is always careless with his schoolwork.Could you help him?
—No problem!I think he _______ to think twice before starting.
A.should be told B.shouldn't be told C.should tell
5.The air pollution is very serious in our city. Something ________ about it now.
A.can do B.must do C.was done D.must be done
6.You throw it away. It can .
A.needn’t; recycle B.needn't; be recycled C.don' t need; be recycled
7.Some people think trees ____ on Tree Planting Day only.
A.should plant B.should be planted
C.should be plant D.should be planting
8.—A new airport will be buit in Tantou, Longhui.
—Good news! But a lot of good farmland __________.
A.will waste B.may be wasted C.has wasted
9.— Must we clean the classroom now?
— No, you needn't. It after school.
A.may clean B.must clean C.need be cleaned D.can be cleaned
10.—Final exam is coming, Tom. Don’t watch TV for too long.
—I’m not a child any more. I ______ what to do.
A.should always be told B.should always tell
C.shouldn't always be told D.shouldn’t always tell
11.Food safety is important. Rules ________ to protect people from food pollution.
A.must make B.must be made C.can't make D.can't be made
12.Thanks to the Internet, different kinds of information _____ in a short time.
A.can be learned B.has been learned
C.can learn D.has learned
13.—When should I hand in my paper?
—Your paper must as soon as the bell .
A.hand in; rings B.hand in; will ring
C.be handed in; will ring D.be handed in: rings
14.Teenagers should ________ to take care of themselves from a young age.
A.educate B.be educating C.have educated D.be educated
2
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