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1、U8 Welcome to the unit. 句子考点讲解：句1：We canreduce air pollution by ridingbicycles. 我们可以通过骑自行车来减少空气污染。reduce v. 减少，降低 反义词：increase增加” 短语： reduce.to 把减少到 reduce.by 把减少了例句：1. The government is now bringing in laws to reduce air pollution. 政府如今正推行法律以减少空气污染。 2. The skirt was reduced to $ 10 in the sale. 在大减
2、价期间,这条裙子减价到10美元。3. As a result, costs will be reduced by 90%. 因此,成本将会降低 90%。句2：We can save energy by turning off the lights when we leave a room. 我们可以通过离开房间时关灯来节约能源。 turn off 关上(开关) 注意：是动词+副词 型短语,代词作宾语时放在 turn 与 off 中间,名词作宾语时,可以放在 turn 与 off 中间,也可放在 off后边。 例句：1. The light is a bit harsh. You can tur
3、n it off. 灯光有点刺眼。你可以把它关掉。2. Turn off the TV, be friends with the books and let your dream fly! 关掉电视,以书为友,放飞你的梦想。【辨析】turn off 与 closeturn off 指关上(自来水、煤气、电器等的开关)，其反义短语是turn on；close 指把门窗、箱子、盒子等关上，其反义词是open. 【拓展延伸】与turn 有关的其他短语:turn down 拒绝;调低 turn in 上交turn.into. 把变成turn up 调高;出现 turn out 结果是turn to 翻
4、到;向求助 牛刀小试：Please _the computer, Lily. Its time for you to go to bed. A. turn off B.turn upC. turn on句3：We can protect the environment by recycling waste. 我们可以通过回收利用废物来保护环境。recycle v. 回收利用，循环利用There are many things that can be recycled. 有很多东西可以被回收利用。【拓展延伸】recycling 是不可数名词： 回收利用,循环利用。 Recycling of pa
5、per, steel, and plastic is important for protecting the environment. 回收利用纸、钢和塑料对于保护环境很重要。牛刀小试：Yueda Group has found a way to _ the waste and doesnt put it into the river any more.A. produce B. recycleC. require D. protect句4：What should we do to live a green life. class? 同学们，为了过绿色生活我们该做什么呢?短语：live a(
6、n). life 过着生活 例句：1. Everybody wants to live a happy life. 每个人都想过着幸福的生活。 2. Many people in this village live a poor life. 这个村子里很多人过着贫穷的生活。句5：My dad used to drive me to school, but now we take the underground. 我爸爸过去常常开车送我去上学，但现在我们坐地铁。drive sb. to. 开车送某人去drive sb. to.中的 drive 是动词：驾车送(人)其过去式和过去分词分别是drov
7、e和 driven, 注意：其后跟 home 等地点副词时不加介词 to。例句：1. His daughter Carol drove him to the train station. 他的女儿卡萝尔开车将他送到火车站。2. Wait a minute. Ill drive you home.等一会儿。我会开车送你回家。【拓展延伸】drive作动词, 还可意为开车,驾驶。 drive to. 开车去某地, 相当于go to. by car. 例句: 1. I want to drive to the countryside nearby. 我想开车去附近的乡村。句6：More and mor
8、e families own cars and this causes serious air pollution. 越来越多的家庭有了小汽车，这导致了严重的空气污染。cause v.导致，造成，引起常用结构为: cause sth. 导致cause sb. sth. 给造成cause sb./sth. to do sth. 导致做某事例句：1. The doctor also said that her age might cause some problems.医生还说,她的年龄可能会导致一些问题。2. He caused his friends much unhappiness. 他弄得
9、他的朋友们很不愉快。3. The cold weather caused the plants to die.寒冷的天气导致了植物死亡。 【拓展延伸】cause 也可作名词：起因,理由。例句：1. Bad management was a cause of the failure.经营不善是失败的一个原因。2. You should not be absent from school without cause.没有理由,你不该旷课。语串记3. Smoking can cause lung cancer, and actually it is one of the main causes of
10、 lung cancer. 吸烟可致肺癌,确实,吸烟是肺癌的主要诱因之一。句7：Its wise for people to choose public transport or ride bicycles.对于人们来说，选择公共交通工具或骑自行车是明智的。wise adj.明智的，充满智慧的其近义词是clever/bright smartbe wise to do sth. 做某事是明智的。例句：1. A difficult situation, in the eyes of a wise man, often means a chance of success.逆境在聪明人的眼中常常意味着
11、成功的机遇。2. I think you were wise to leave when you did.我认为你当时走掉很机智。【归纳总结】wisely adv.明智地 wise adj. 明智的，充满智慧的 wisdom n.智慧例句：1. Experience is the mother of wisdom.经验为智慧之母。2. We must spend this money wisely.我们必须明智地花这笔钱。牛刀小试：根据汉语提示完成单词。Natural resources are very important for us, and we should use them _(明智地).学科网（北京）股份有限公司