Unit 13知识点详解2023-2024学年人教版九年级英语全册

unit 13 We’re trying to save the earth Section A 1.People are throwing litter into the river.人们正在往河流里到垃圾 litter作动词，相当于throw about。作不可数名词时，指“垃圾，废物”。 Don't litter the ground with paper. 不要往地上扔纸 You mustn't throw about litter. 你一定不能乱扔垃圾 throw litter around.到处丢垃圾；throw around 到处扔 throw litter around = throw around litter (litter是名词，即可以放后面也可以放中间，但代词只能放中间，如：throw it around ) 2.Even the bottom of the river was full of rubbish.甚至河流底部都充满了垃圾 bottom作名词表示“底部，末端”，常用搭配： the bottom of...“...的底部”；at the bottom“在底部”；at the bottom of..“在..的底部” The bottom of the cup is plastic.这个杯子的底部是塑料的 A ship sank to the bottom of the sea.一艘船沉在了海底 There is something at the bottom of the pool.泳池底部有东西 其反义短语是本单元所学的at the top of..“在...的顶部/顶端” Sharks are at the top of the food chain.鲨鱼在食物链的顶端 There are some birds at/on the top of the roof.屋顶上有一些鸟儿 3.This is turning beautiful places into ugly ones.这件事正在把美丽的地方变成丑陋的地方 形容词ugly意为“丑陋的，险恶的”，多用来修饰人或事物的外貌，其比较级是uglier；最高级是ugliest；其名词是ugliness“丑陋，难看” I have never seen such an ugly dog before.我以前从来没见过这么丑的狗 turn..into....“把....转变成....” The witch turned the prince into a frog.女巫把王子变成了青蛙 4.There are other advantages of bike riding.骑自行车还有其他的优点 名词advantage意为“优点 有利条件, 优势”，指因某方面占优势或利用某机会以及对方弱点而获得利益与好处；常用搭配： take advantage of利用 We should take advantage of all educational resources we have. 我们应该利用手上所有的教育资源 have the advantage of 胜过 You have the advantage of me in experience.在经验方面你胜过我 the advantage of... ...的优点 The advantage of this method is its efficiency. 这个方法的优点在与它的高效性 5.it doesn’t cost anything.它不需要任何花费 cost 作动词意为：花费，价钱，使付出代价 How much does it cost？这个要多少钱？ cost作名词意为：价格，成本，代价 the cost of.. ...的价格/成本 The cost of this new house is a million dollars.这个房子的价格是100万美元 at the cost of.. 以..为代价； production cost 生产成本；at any cost 不惜任何代价 表示花费的几种表达： 1　 人+spend + money/time on sth/doing sth 某人花费多少时间/金钱做某事 2　 人+ pay +money +for sth 花费金钱买某物 3　 It takes+人+time to do sth.做某事花费某人多长时间 4　 sth cost sb some money 某物花了某人多少钱 He spent 200 yuan buying the jacket. =He spent 200 yuan on the jacket