Unit 6单元复习讲义（单词、短语、句型、语法、练习） 2024-2025学年沪教版英语七年级下册

Unit 6  Electricity everywhere 电无处不在

 

1. The important words, phrases and sentences

(1)     What do the pictures have in common?

这些图片有什么相同之处？

(2)     However, it turned out that it was very hard to live without electricity.

然而结果发现，没有电是很难生活的。

(3)     After it got dark, my little brother Benny and I could only read and write by candlelight.

天黑后，我和弟弟本尼只能在烛光下读书写字。

(4)     Instead, we played video games for a while, but then our tablet ran out of battery.

取而代之的是，我们玩了一会儿电子游戏，但后来我们的平板电池的电用光了。

(5)     Since there wasn’t any electricity, some things in the fridge quickly went bad.

因为没有电，冰箱里的一些东西很快就变坏了。

(6)     By noon, it got really hot inside our apartment, but we couldn’t turn on the air conditioner.

到了中午，我们公寓里变得非常热，但我们不能打开空调。

(7)     Even worse, most household tasks became very difficult without electricity.

更糟糕的是，没有电大多数家务变得非常困难。

(8)     They produced electricity by rubbing fur against smooth stone.

他们用皮毛接触光滑的石头摩擦来生电。

(9)     Electricity travels at the speed of light, which is about 300 million metres per second.

电以光速传播，即每秒传播3亿米。

(10) A British inventor built the first electric car around 1832, but it was impossible to drive electric cars until the second half of the nineteenth century.

大约在1832年，一位英国发明家造出了第一辆电车。但是直到19世纪下半叶人们才得以驾驶电车。

(11) Read the instructions carefully before you use a new electrical appliance.

使用新电器之前要仔细阅读说明书。

(12) We need to make sure that the cables are connected correctly before we turn on the device.

打开家电设备前，我们要确保电缆是正确连接的。

(13) Switch off the lights when you leave home.

出门要关灯。

(14) They do this because they care about climate change.

他们这么做因为他们关注气候变化问题。

(15) More than 2.2 million homes and businesses joined in.

超过220万户和企业参加（地球一小时）。

(16) The same amount of electricity could power thousands of computers or television sets for an

hour.

同等电量可以给数千台电脑或电视机供能一小时。

(17) Every year, many landmark buildings in Chinese cities turn off their lights for Earth Hour.

每年，很多中国城市的地标性建筑在地球一小时活动中关电。

(18) It will be even more fun if you ask your friends, family and classmates to join in as well.

如果邀请朋友，家人和同学也来加入的话，那么这个活动就会更有趣了。

  

2. Grammar

情态动词

(1)     基本用法

①　后面跟动词原形

②　一个实义动词前，不能同时使用一个以上的情态动词

He may can do it.   （×）   

(2)     can和could

①　表示能力

I can climb this cliff.

It was so noisy in this restaurant that we couldn’t hear ourselves speak.

②　表示可能

Smoke can cause cancer.              I could do it now, if you like.

③　表示请求，许可

Can I phone you tomorrow?            Could I speak to Mr Davis?

(3)     may和might

①　表示可能

He may be in his office.           He said he might come tomorrow.

②　表示请求，许可

May I come in?         You may go swimming, but be home by four.

(4)     must

①　表示必须

You must take these tablets every day.

②　mustn’t表示不准、不许

Cars must not be parked around the corner.

★ 回答must的疑问句时不能使用mustn’t，而用don’t have to/needn’t，表示“不必要”

—Must I go first?

—No, you needn’t./No, you don’t have to.

③　must没有过去时态，要表示“过去必须”，可以使用must或者had to

He told me that I must sit down.         She had to stay here to midnight.

④　must用于推测，表示“肯定”

You must be hungry after so long a journey.

 

3. Practice