Unit 13 We are trying to save the earth!Section A Grammar Focus-4c 课件(共36张PPT)

(共36张PPT)
Unit 13
We are trying to save the earth!
take part in
afford
turn off
reusable
pay for
take action
transportation
参加
v. 买的起；承担的起（后果）
关掉
adj. 可重复使用的
付费；付出代价
采取行动
n. 运输业；交通运输
Words Review
We’re trying to save the earth. Present progressive
The river used to be so clean. used to
The air is badly polluted. Passive voice
No scientific studies have shown that shark fins are good for health. Present perferct
We should help save the sharks. Model verbs
Grammar Focus
Joe: _____you ever _____ (take) part in an
environmental project
Ken: Yes, I have. I _____ (help) with a Clean-Up
Day last year. It was___________(consider)
the biggest clean-up project this city ever
________(have).
Fill in the blanks with the correct forms of the verbs in brackets.
4a
Have taken
helped
considered
had had
Joe: How many people ______ (take) part
Ken: I _____ (think) more than 1,000 people
_____(come) to help out.
Joe: That’s fantastic! I guess everyone in this city
is _____ (try) to improve the environment.
Ken: Yes, we can't afford to _____ (wait) any longer to take action!
took
think
came
trying
wait
Fill in the blanks with the appropriate modal verbs from the box.
People _____ think that big things _____ be done to save the earth. Many forget that saving the earth begins with small things. For example, you _____ save electricity by turning off the lights when you leave a room. You _____ also use reusable bags instead of plastic bags.
4b
can would could have to should must may/might
may
must
could
could
I think it’s a great idea that you now _______ pay
for plastic bags in some stores. And instead of
driving to school or work, you _____ ride your
bike or walk. If it’s far, you take the bus. All these
small things ______ add up and become good
things that ________ improve the environment.
Let’s take action now!
have to
can
could
can
Make a list of things that people can do to help the environment and discuss your list with your partner.
4c
A: I think that everyone should use public
transportation.
B: I disagree. It’s difficult for parents with
young children to use public
transportation...
use public transportation
...
Discussing...
use public transportation
take your own shopping bags when go shopping
reduce the use of air conditioners in summer
turn off the lights when you leave the room
grow more plants...
A: I think that everyone should take your own
shopping bags when go shopping.
B: I agree. It's good for the environment.
A: I think that everyone should reduce the use of air conditioners in summer.
B: I disagree. The summer is so hot, especially in south China. Without air conditioners, people may not have the patience to work.
A: I think that everyone should turn off the
lights when you leave the room.
B: I agree. It's good to save energy resources.
A: I think that everyone should use public
transportation.
B: I disagree. It's difficult for parents with
young children to use public transportation.
A: I think that everyone should grow more
plants.
B: I agree. Growing more plants will provide
us more fresh air and make our planet
more beautiful.
现在进行时
（1）含义：表示正在发生或进行的动作。
（2）基本结构：
主语 + be + 现在分词（be 的形式随主语的变化而变化）
（3）基本用法：
①表示现在正在进行的动作。特征：常常与now或具体的时间连用，有时句中会有感官动词来提示，或通过上下文来暗示。
②表示现阶段一直进行的动作。这类动词常常是延续性动词。常与at present, this week, these days等连用。
③表示主语的特征、性格、能力等
本单元复习现在进行时、used to句型、被动语态、
现在完成时和情态动词。
现在完成时
（1）含义：表示过去发生的动作对现在还有影响。
（2）基本结构：主语 + have / has + 过去分词
（3）基本用法：
①表示过去发生的动作，但强调对现在产生影响。特征：不能与表示具体的时间状语连用。
②表示过去发生的动作或存在的状态一直延续到现在，还可能继续下去。常常与since, for, in the past + 时间名词，in the last +时间名词等时间状语连用，而且谓语动词要求是延续性动词。
③表示一种“经历或体验”，即可以表示经历过也可以是从来都没有经历过。
被动语态
初中阶段我们学习了七种被动结构，归纳如下：
（1）一般现在时的被动语态：am / is / are + 过去分词
（2）现在完成时的被动式：
have / has + been + 过去分词
（3）现在进行时的被动式：
am/ is/ are + being + 过去分词
（4）一般过去时的被动式：was / were + 过去分词
（5）过去进行时的被动式：
was / were + being + 过去分词
（6）过去完成时的被动式：had + been + 过去分词
（7）一般将来时的被动式：
will / be going to be+ 过去分词
（8）含有情态动词的被动式：
情态动词+be +动词的过去分词。
情态动词
情态动词表示说话人对某一动作或状态的态度，如认为“可能”、“应当”、“必要”等。情态动词本身有一定的意义，但不能单独作谓语，也没有人称和数的变化。后面一般跟动词原形。
used to 结构
used to意为“过去常常做某事”，指的是过去的习惯性动作，目的在于与现在形成对照。used to是个情态动词，其中的to是不定式符号，后面跟动词原形。在美式英语中，它的疑问式是：Did ＋主语＋use to do sth．？否定式是：主语＋didn't use．．。在英式英语中，它的疑问式应当是：Used ＋主语＋to sth．？否定式应当是used not to
He used to stay up late. 他过去常熬夜到很晚。
辨析：join, join in 和take part in
to
join 加入组织，团体，党派等，有作为其中的一个成员的含义;
后面也可以加表示人的名词，表示和某人一起参加某活动
join in 加入一种具体活动。
take part in 指参加会议或群众性活动等，着重说明句子主语参加该项活动并在活动中发挥作用。
Will you join us in the discussion
你参加我们的讨论吗？
She joined the Young Pioneers.
她加入了少先队。
Why didn't you join in the talk last night
昨晚你为什么没参加座谈？
Did you take part in the sports meet
你参加运动会了吗？
1. —Have you _____ a club
—Yes, I’m in a swimming club and I often
_____ the swimming training.
A. joined; take part in
B. joined; join
C. taken part in; join
D. taken part in; join in
2. —We’re going for a picnic. Would you like
to____ us
—Why not Let’s go!
A. attend B. join C. join in D. take part in
⑴ afford是动词，意为“买得起,担负得起”，通常与can, could, be able to连用,多用于否定句中。
They couldn’t afford $50 for a ticket. 他们拿不出50美元买一张票。
⑵ afford后面常跟带to的动词不定式。
We can’t afford to go abroad this summer. 今年夏天我们没有足够的钱出国。
例句：Miss Taylor never wastes money on anything too expensive, even though she can _____to. She has donated much of the money she saved to charities.
A. afford B. allow C. remind D. pay
afford
I. 用所给词的适当形式填空。
1. The old man used _____ (be) a teacher.
2. We should _____ (clean) the room every day.
3. Look! Tom _________ (sleep) in his room.
4. Lots of trees __________ (plant) on the hill
every year.
5. He _________ (live) here for 20 years.
to be
clean
is sleeping
are planted
has lived
用括号里所给动词的正确形式填空。
1. The girl ___________(dance) in the classroom now.
2. It's 5 o'clock now. Mike _________ (have)dinner.
3. --____ you ever ____ (be) to the US
-- Yes, twice.
4. -- May I speak to John
-- Sorry, he __________(go) to New York. He will be back in two days.
5. --Did you go to Jack's birthday
-- No,I ______________(not invite).
is dancing
is having
Have been
has gone
was not invited
6. --Do you know Mr. White well
-- Yes. He __________(work) for the WWF for two years.
7. I __________ (live) here since 1990.
8. -- Do you often clean your classroom
-- Yes. Our classroom __________(clean) every day.
9.-- What's this
--It's a CD. This CD _________(use) for learning English.
10. A new highway in my hometown ___________ (bulid) next month.
has worked
have lived
is cleaned
is used
will be built
情态动词练习
1.-- ____ you pass me a pen I'd like to write down the phone number.
-- Sure. Here it is.
A.Can B.Need C.Might D.Must
2. -- May I go to the cinema, Mum
-- Certainly, but you ___ be back by 11 o'clock.
A.can B.may C.must D. need
3. You ___ worry about me. It's nothing serious.
A.can't B.mustn't C. needn't D. won't
4. -- Excuse me. Is this the right way to the
Summer Palace
-- Sorry, I'm not sure. But it ____ be.
A. might B. mustn't
C.can't D.must
5. The man in the office ____ be Mr.Black, because he went home just now.
A.musn't B.may not
C.can't D.needn't
use to 练习
A 她过去常常周末和朋友闲逛。
She _______________ with friends on weekends.
B 他习惯于每晚睡得很晚。
He ____________________________ at night.
C. Ken used to be afraid of dogs.(改为一般疑问句)
______________________________
used to hang out
is used to sleeping late/ staying up
Did Ken use to be afraid of dogs
1. He promised to pick me up at the school gate. However, he _____ yet.
A. didn’t arrive B. doesn’t arrive
C. isn’t arriving D. hasn’t arrived
2. Ba Jin, one of the greatest writers in China, ___ as “People’s Writer”.
A. is regarded B. has regarded
C. is regarding D. regards
Choose the best answer.
3. —Where is Tom
—He ______ in his room.
A. is reading B. reads
C. read D. was reading
4. —May I go out now, Dad
— No. You _____ let your mother know first.
A. can B. may C. need D. must
5. Her son _______ coke, but now he ________ milk.
A. used to drink ; is used to drinking
B. used to drinking ; drinks
C. is used to drinking ; used to drink
D. is used to drink ; is drinking
1. (2013江苏淮安) It's getting dark. Please
________ the light.
A. turn on B. turn off
C. turn down D. turn around
2. (2013湖北随州)–How does Jack usually go to work
—He ______ drive a car, but now he ______ there to lose weight.
A. used to; is used to walk
B. was used to; is used to walking
C. was used to; is used to walk
D. used to; is used to walking
感悟中考
3. (2013山东枣庄) In the last ten months, September Miracle (奇迹) ____on CCTV for more than five times and is popular all over the country.
A. has played the piano
B. has given out their song disks
C .has written songs
D. has performed
4. (2013广东) Not only my friends but also I _______ interested in football and Messi is our favorite star.
A. be B. am C. is D. are
5. (2013湖北宜昌)—At present, one of the best ways to study is working in groups.
—More chances _______ to students to learn from each other.
A. offer B. are offered
C. have offered D. are offering
感悟中考
Homework
Write an article to show in what way
we students can protect the environment.