Unit13 We're trying to save the earth!
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13. 在……中起作用，在……精中选p扮pt 演角色
play a part in 2
1.r骑id自e t行he车bike 2.T骑h自er行e a车re有ot别he的r a好dv处an。tages of bike riding. 3.b对e.g..o..o.有d 益for 4.w垃a圾ste污p染ollution 5.g去o 购sh物opping 6.s开ta始rt 做do某in事g 7.r记em得e要mb把er垃to圾t扔hr进ow垃ru圾b桶bish in the bins 8.k保ee持p公pu共bl场ic 所pla的ce整s c洁le和an美an丽d beatiful 9.m对a..k..e..有a d影iff响er、en有ce作to用sb. 10.l通ea向d t美o 好a b未et来ter future
(might), must, need, shall (should), will (would) 等。 2. 情态动词无人称和数的变化, 后接动词原形。否 定式是在情态动词后面加not。个别情态动词有 过去式形式, 可用来表达更加客气、委婉的语气。
e.g. Ken can climb up the tress like a koala.
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1. 现在进行时: Present Progressive 定义：表示说话时(瞬间)正在进行的动作, 也表示目
前或现阶段正在进行的动作。 结构: be (am/is/are) + v.-ing 标志词：Look, Listen, now, right now… e.g. Look! The boy is crying.
You mustn’t play with fire. It is dangerous.精Fra bibliotekppt6
4b Fill in the blanks with the appropriate modal verbs from the box.
can
would
have to should
may/ might
表示从过去某一时间开始一直延续到现在并还可能
持续下去的动作。
结构: has/have + 过去分词
标志词：already, yet, ever, never, since, for…
e.g. I haven’t finished my精h选oppmt ework yet.
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情态动词
1. 情态动词本身有一定的词义, 表示说话人的情 绪、态度或语气, 但不能单独作谓语, 只能与其 他动词构成谓语。常见的有: can (could), may
ed to do
used to do sth. 表示过去常常做某事, 而现在往往不做 了, 后接动词原形。
e.g. I used to get up at six o’clock. be used to doing sth. 表示习惯于做某事 Joe is used to drinking a cu精p选ppot f coffee every morning4 .
could must
People _m_a_y_/_m_i_g_h_t_ think that big things
_m_u__st__ be done to save the earth. Many
forget that saving the earth begins with
small things. For example, you _c_a_n_ save
be full of
7. 政府
government
8. 9.
把垃圾扔到河里 要求某人干某事
throw rubbish into the river
10. 关闭工厂 close down the factories ask sb. to do sth.
11. 打扫
clean up
12. 过去常常… used to be
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adj.可重复使用的 关掉 electricity by turning off the lights when you leave a room. You _c_o_u_l_d_ also use reusable bags instead of plastic bags. I think it’s a great idea that you now h__a_v_e_t_o pay for plastic bags in some stores. And instead of driving to school or work, you _c_a_n_/s_h_o_u_l_d_ ride your bike or walk. If it’s far, you _c_a_n_/_c_o_u_ld__ take the bus. All these
Unit 13
We are trying to save the earth.
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Review
1. 努力去做某事 try to do
2. 手机
mobile phones
3. 垃圾,废物
litter ; rubbish;waste
4. 河底 the bottom of the river
5. 充满…… 6. 渔民 fisherman
3.被动语态：Passive voice
定义：表示主语是动作的承受者，即行为动作的对 象的一种语态。
结构：be + 过去分词
e.g. Our classroom is cleaned every day. 4.现在完成时: Present Perfect
定义：表示动作已经完成, 但对现在造成影响; 或者
付费;付出代价
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small things _c_o_u_ld__ add up and become big things that _w_o_u_ld_/_c_a_n_ improve the environment. Let’s take action n采o取w行! 动
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