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1、九年级英语全册Unit13单元知识点【Useful expressions】1.throw.into.把.扔进.2.used to 过去常常3.play a part in 在中起作用4.clean up 打扫5.cut down 减少6.instead of 代替7.be good for 对.有益8.takeaway food 外卖食品9.make a difference 产生影响或作用10.hear of 听说11.cut off 切除12.not only .but also.不但.而且.13.be harmful to 对有害14.no longer 不再15.at the top
2、 of 在.顶部或顶端16.the number of. .的数量17.so far 到目前为止18.take part in 参加19.take action 采取行动20.turn off 关掉21.pay for 付费;付出代价22.lead to 导致23.such as 例如24.in danger 处于危险之中25.cant afford to do sth.承担不起做某事26.turn.into.把变成.27.be badly polluted 被严重污染28.in the last 20 to30 years 在过去的20至30年里29.throw away 扔掉;抛弃30.p
3、ut sth.to good use 好好利用某物31.pull.down 拆下;摧毁32.be made of 由制成33.set up 建立34.be known for 因而闻名35.bring back 恢复;使想起;归还36.upside down 上下颠倒37.build.out of.用.建成.38.environmental protection 环境保护39.the importance of. .的重要性40.bring happiness to.把幸福带给.41.think about 考虑42.win a prize 赢得一个奖【Target sentences】1.W
4、ere trying to save the earth!2.Remember to throw rubbish in the bins and keep public places clean and beautiful for everyone.3.This is not only cruel，but also harmful to the environment.4.The numbers of some kinds of sharks have fallen by over 90 percent in the last 20 to 30 years.5.We cant afford t
5、o wait any longer to take action!6.So far, no scientific studies have shown that shark fins are good for health.7.To cut down air pollution， we should take the bus or subway instead of driving.8.Everyone in this town should play a part in cleaning it up!9.So together, our actions can make a differen
6、ce and lead to a better future!10.The gate in front of her house is made of rocks and old glass bottles.11.He is known for using iron and other materials from old cars to make beautiful art pieces.12.Have you ever thought about how these things can actually be put to good use？13.She lives in a house
7、 in the UK that she built herself out of rubbish.14.Not only can the art bring happiness to others,but it also shows that even cold, hard iron can be brought back to life with a little creativity.15.Recycling paper is really easy.16.But its hard to stop riding in cars.【Language points】1.There are ot
8、her advantages of bike riding.advantage作名词，其反义词为disadvantage“缺点；不利条件”。take advantage of .意为“利用.”。Before making your decision, you should consider the advantages and disadvantages.When possible, take advantage of this time to enjoy the nice weather.2.Its good for health and it doesnt cost anything!co
9、st /kst/, /kst/ v.花费cost在此处作动词，过去式和过去分词均为cost。The watch cost me 200 yuan.【拓展延伸】cost还可作名词，意为“花费；价钱”。Could you tell me the cost of the trip? 【易混辨析】cost, spend, take与pay3.Mmm, I think simple things like bringing a bag to go shopping can help.bring(.to.)拿来: 把某物/人从别处带到说话处【易混辨析】 carry, fetch/get与take4.Yes
10、, we cant afford to wait any longer to take action！A computer is what I want most, but I cant afford one now.The mother couldnt afford to pay for her childs education.It afforded her the chance to improve her tennis skills. 5.Many have heard of shark fin soup.【易混辨析】hear from, hear about与hear ofI did
11、nt hear of this town.I happened to hear about his plans for the vacation.I heard from my father last week.6.When people catch sharks, they cut off their fins and throw the sharks back into the ocean.cut off 切除throw back 扔回到7.This is not only cruel, but also harmful to the environment.(1)harmful是形容词，
12、意为“有害的”。常见搭配：be harmful to.对有害。(2)harmful的名词是harm，意为“伤害，损害”。常见搭配：do harm to.be harmful to.对有害。如：Smoking does harm to health.Smoking is harmful to health.8.Have you ever taken part in an environmental project? take part in 参加;多指参加会议或集体性的工作或活动，且参加者在其中发挥一定的作用。【易混辨析】take part in、join与attend9.And the gat
13、e in front of her house is made of rocks and old glass bottles.be made of 由.制成【易混辨析】10.Have you ever thought about how these things can actually be put to good use? put sth.to good use 好好利用某物等于make good use of sth.11.She lives in a house in the UK that she built herself out of rubbish.build sth.out
14、of 用建造/制作某物12.He is known for using iron and other materials from old cars to make beautiful art pieces.be known for 以而闻名13.Not only can the art bring happiness to others, but it also shows that even cold, hard iron can be brought back to life with a little creativity.(1)当not only 位于句首时，其后的分句要用倒装语序。
15、(2)bring back恢复；使想起；归还14.Rethink, Reuse, Recycle!Prefix(前缀): a group of letters added to the beginning of a word to change the meaning of the word.e.g.re + think= rethinkun + usual= unusualsuffix（后缀）: a group of letters added to the end of a word to change the part of speech.e.g.actual(adjective) +
16、ly = actually(adverb)build(verb) + ing = building(noun)【Grammar Focus】Example sentences现在进行时Now people are taking action to save wild animals.Lets join them.Look! Kenny is swimming happily in the pool.Listen to me carefully please.I am talking about something very important.Be quiet, please.The baby
17、 is seeping.现在完成时He has kept this book for over two months.Please ask him to return it soon.We have lived here since my little sister was born.I like the people here.He has already tried this to solve the problem, but it didnt work.被动语态Photos and experiences are shared on the microblog.The video was
18、 sent out quickly and was seen by many schoolmates.In the future, robots will be used (将被使用) by more and more people.情态动词Ken can climb up trees like a koala.Tracy could ride a bicycle when she was five years old.You mustnt play with fire.It is dangerous.Its raining outside, so I have to take an umbr
19、ella with me.Would you please do me a favor? Put the map up on the wall please.As a student, we should obey the school rules.The light is on in the office.Someone may be there.【Topic writing】Save the Earth: Lets Do Our Part!The earth is the only home for everyone on it.Its crying for our help now.As
20、 middle school students, we have the ability to make a difference so we should play a part in helping save the earth!To protect the earth, first of all, we can not only save water but also reduce waste in our daily life.Secondly, more trees should be planted in our school so that students can breath
21、e fresh air when they play outside.Last but not least, we are supposed to choose to ride a bike instead of driving a car when we go somewhere near to help reduce pollution.To create a better future for ourselves and the next generation, we should do what we can to protect the environment.Lets do our part to take action from now on.8