资源简介

(共35张PPT)
Unit 7
Teenagers should be allowed to choose their own clothes. （三）
语法加油站
情态动词被动语态
一、核心结构
情态动词的被动语态基本公式：
情态动词 + be + 过去分词（done）
情态动词：can, may, must, should, need
（情态用法）, will, would, shall, ought to 等。
be 动词：必须用原形（因情态动词后接动词原形）
过去分词：规则动词加 - ed，不规则动词需记忆
（如 do→done, make→made）
2. may /might（许可、可能）
主动：They may use this tool.
（他们可以使用这个工具。）
被动：The tool may be used by them.
（这个工具可以被他们使用。）
疑问：May the report be handed in tomorrow
（这份报告可以明天提交吗？）
既学既练
1. These math books ________________ (might/sell)
at the book sale tomorrow.
8. The drawer __________________ (can/open) with
this key—try it again.
can be opened
might be sold
3. must /have to（必须、义务）
主动：We must finish the work today.
（我们必须今天完成这项工作。）
被动：The work must be finished by us today.
（这项工作必须被我们今天完成。）
否定（禁止）：This area mustn't be entered without permission.
（未经许可禁止进入该区域。）
既学既练
1.The project ________________ (must/finish) before
5 o’clock this afternoon.
2. Students ______________________ (have to/wear) uniforms on school days, but today is a casual day.
must be finished
have to be worn
4. should /ought to（应该、建议）
主动：We should protect the environment.
（我们应该保护环境。）
被动：The environment should be protected by us.
（环境应该被我们保护。）
ought to 搭配：The rules ought to be followed.
（这些规则应该被遵守。）
既学既练
1. These laws ___________________ (should/not/break)
by anyone in China.
2. The broken window _____________________
(ought to/repair) as soon as possible to keep
the room warm.
shouldn’t be broken
ought to be repaired
5. need（情态动词：需要，多用于否定 / 疑问）
主动：Tom needn't do the dishes now.
（汤姆现在不必洗碗。）
被动：The dishes needn't be done now.
（碗现在不必洗。）
注意：need 作实义动词时，被动语态为 “need to be done”
Eg: The bedroom needs to be cleaned.
既学既练
1. Your homework _____________________
(need/not/hand in) today; you have one more day.
2. The lazy boy’s room needs ______________ (clean)
immediately—it’s too messy.
needn’t be handed in
to be cleaned
三、特殊用法与注意事项
1.否定形式：直接在情态动词后加 not
（如 can→can't, may→may not, must→mustn't）
结构： 情态动词 + not + be + 过去分词 .
2. 疑问形式：将情态动词提前至句首
结构：情态动词 + 主语 + be + 过去分词？
Eg: Can the machine be fixed
三、特殊用法与注意事项
3.无被动的情况：部分情态动词（如 dare 作情态动词时）
较少用于被动，若需表达被动含义，转换为实义动词。
Eg: You dare not be criticized.
→ You doesn't dare to be criticized.
4.过去分词的正确性：被动语态的核心是 “be + 过去分词”，
需确保过去分词形式正确（如 see→seen，not seeed）。
既学既练
1. _________(敢于) he tell the truth
2. Nobody would ________________(dare/ question)
the professor’s idea.
3. No one dared ____________(talk) about the secret.
to talk
Dare
dare question
四、口诀总结
情态被动不复杂，
“情态 + be + done” 记牢它；
否定 not 加情态后，疑问情态提前走；
need 有两种用法，
情态 “needn't be done”，
实义 “to be done” 别搞差。
语法提升
1. This secret __________________ (had better/not/tell) to anyone—
otherwise, we’ll get into trouble.
2. The missing book ___________________ (must/steal) by someone
last night; the door was unlocked.
3. The old tower ______________________(should/not/destroy) during
the construction—its history is valuable..
4. These report ___________________ (may/not/copy) without the
manager’s permission.
had better not be told
must have been stolen
should not be destroyed
may not be copied
语法提升
5. The experiment _______________ (can/do) in the lab, but we need
special equipment first.
6. The thief ________________________ (might/arrest) by the police
already— let’s seek the news.
7. Children ___________________ (ought to/teach) to respect the
elderly from an early age.
8. This task _____________________ (need/not/finish) until next
Friday, so take your time.
can be done
might have been arrested
ought to taught
need not to be finished
Section B
New words
1. get in the way of
挡……的路；妨碍
get sth. done 让某事(被)做
get down to 开始做，开始认真对待
Go and get your hair cut.
It’s time to get down to your shop.
get in the way of +n./ pron /v.-ing
可用be in one’s way 或 be in the way of...替换。
Playing computer games can get in the way of your study.
Don’t stand at the door. You’re in my way.
1. But sometimes these can get in the way of their schoolwork,…
get in the way of 挡...... 的路；妨碍
Language points
既学既练
1. Don’t let your toys _______ _____ _______ _______
(挡路).
2. Your smart phone doesn’t work, and you’d better
get it _________(repair).
get in the way
repaired
New words
2. support
v.＆ n. 支持
support sb. in (doing )
（在......方面）支持某人/某事
They supported us in the working
for protecting the evironment.
Whatever you do, I will support
you forever.
（1）support n. 支持
We’re very thankful for your support.
（2）support v. 养活，赡养；资助，赞助
Several major companies are supporting the project.
（3）in support of 支持；证明
He made some experiments in support of his own idea.
2. My wife and I have supported every one of his races.
support /s p :(r)t/ v. & n. 支持
Language points
既学既练
1. My parents __________ (support) my decision
to study music three years ago.
2. Family give me strong ___________ (support)
for going abroad to study.
supported
support
New words
3. end up
最终成为；
最后处于
end up sth
end up doing sth
Humans ended up with a sense
of adventure.
既学既练
1. If you try to remember everything you
will end up ______________(remember)
nothing.
remembering
New words
4. enter
v. 进来；进去
enter “进来；进去”，
相当于 go / come into
enter v.“考上（大学或学校）
I believe I will enter a good high
school this year if I try hard.
（1）enter vt. 报名参加
Linda will enter a writing competition.
（2）entrance n. 入口
Let’s meet at the entrance of the cinema.
3. My parents have always taught me how important it is to
work hard at school and enter university.
enter / ent (r)/ v. 进来；进去
Language points
既学既练
1. Please don’t ________(进入) without
knocking on the door.
2. After I ________(考入) college, I planned
to set new goals in my study and improve
my way of study.
enter
entered
New words
5. choice
cn. 选择；un. 选择权
They made a choice to buy the tomotoes.
make a choice 做出选择
have no choice but to do sth.
除了做某事外, 别无选择。
I have run out of my money. I
have no choice but to walk home!
Eg: It is important for us to make a wise choice
of using smartphones.
choose v. choose- chose- chosen
choose sb. as.... 选择....作为....
Eg: We chose her as monitor.
4. I think I should be allowed to make this choice myself.
choice /t s/ n. 选择；挑选
Language points
既学既练
1. I don’t have much ________(选择权), I’ll have
to do it.
2. At that moment, Tom had no _______ (选择)
but __________(ask) the tourist for help.
3. We can _________whether to stay at home
or take a trip this summer holiday.
choice
choice
to ask
choose
5. We have nothing against running!
①against prep. “反对”，反义词:for,“支持”
be against sth. / doing sth.
Are you for or against the plan
I’m against doing anything till the police arrive.
② against “撞；碰”。
The rain beats against the window.
③ against“紧靠；倚”。
He stood with his back against the door.
Language points
6. Only then will I have a chance to achieve my dream.
本句是only引起的倒装句
“Only+状语+助动词/be动词/情态动词+主语+其他”。
句首的only 后面跟副词、介词短语或从句等作状语，则主句用部分倒装。
如果only 后跟的只是主语，则不用倒装。
Language points
Only in this way can you learn English well.
Only five people were hurt in the car accident.

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