内容正文:
人教版英语
Unit 7 Teenagers should be allowed to choose their own clothes.
Section A Grammar Focus-4c
人教版英语
community
keep…away from
chance
make one’s own decision
educate
manage
society
n. 社区;社团
避免接近;远离
n. 机会;可能性
自己做决定
v. 教育;教导
v. 完成;应付
n. 社会
Words and
Expressions
含有情态动词的被动语态
句式 结构
肯定句 主语+情态动词+be+done(+其他).
否定句 主语+情态动词+not+be+done(+其他).
一般疑问句 情态动词+主语+be+done(+其他)?
特殊疑问句 特殊疑问词+被动语态的一般疑问句?
特殊疑问词+情态动词+主语+be+done?
点拨
I don’t think sixteen-year-olds I agree. They aren’t
should be allowed to drive. serious enough.
Do you think teenagers should be No, I don’t agree with
encouraged to make their own this. Teenagers are too
decisions? young to make their
own decisions.
Teenagers should not be allowed I disagree. They can learn
to have part-time jobs. a lot from working.
Do you think we may be allowed If you don’t use a flash,
to take some photos if we don’t then it may be OK.
use a flash?
Grammar
Focus
自学反馈
含情态动词的被动语态
情态动词的 + be + 动词过去分词
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5
自学反馈
(一)将主动语态的宾语变成被动语态的主语。
(二)将含情态动词的主动句式变成被动句式,即:“情态动词+动词原形”变成“情态动词+be+过去分词”,然后再在其后加“by+主动句中的主语(人称代词用宾格)”。by短语也可省略。
请看下列各句:
转变方法
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自学反馈
You should finish your homework first.
Your homework should be finished (by you) first.
You can take this magazine home.
This magazine can be taken home (by you).
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自学反馈
含情态动词的疑问句、否定句的变化均需借助于情态动词完成。
1. 一般疑问句:直接将被动语态的陈述句中的情态动词提前。
Must this task be finished at once?
这项任务必须立即完成吗?
句式变换
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8
自学反馈
注意:含情态动词的被动语态的一般疑问句的回答,应保留原情态动词,但must表“必须”时,其否定回答应用needn’t;need表“必要”时,其肯定回答应用must。如:
--- Must my exercise book be handed in now?
我的练习本必须现在上交吗?
--- Yes, it must. 是的,必须现在上交。
(No, it needn’t. 不,不必现在上交。)
--- Need he be operated on at once?
他必须立即手术吗?
--- Yes, he must. 是的,他必须。
(No, he needn't. 不,他不必。)
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