人教版英语必修五unit5知识点教学提纲
人教版高中英语必修五 Unit5 重难点知识归纳总结
人教版高中英语必修五Unit 5【重点单词】1.aid /eid/ n.& vt.帮助；援助；资助2.temporary /'tempərəri/ adj.暂时的；临时的3.injury /'indʒəri/ n.损伤；伤害4.bleed /bli:d/ vi.& vt. 流血5. nosebleed /'nəuzbli:d/ n.鼻出血；流鼻血6. sprain/sprein/ vt.扭伤7. sprained /spreind/adj.扭伤的8. ankle /'æŋkl/ n.踝（关节）9. choke /tʃəuk/ vi.& vt.（使）噎住；（使）窒息10. cupboard /'kʌbəd/ n.橱柜；衣柜11. skin /skin/ n.皮；皮肤12. essential /i'senʃl/ adj.最重要的；不可缺少的；本质的13. organ /'ɔ:ɡən/ n.器官14. layer/'leiə/ n.层；层次15. barrier /'bæriə/ n.屏障；障碍（物）16. poison /'pɔizn/ n.毒药；毒害vt.毒害；使中毒17. ray /rei/ n.光线；射线18. complex /'kɔmpleks/ adj.复杂的19. variety /və'raiəti/ n.变化；多样（化）；多变（性）20. liquid /'likwid/n.液体21. radiation /reidi'eiʃn/ n.辐射；射线22. mild /maild/ adj.轻微的；温和的；温柔的23. mildly /'maildli/ adv.轻微地；温和地24. pan /pæn/ n.平底锅；盘子25. stove /stəuv/ n.炉子；火炉26. heal /hi:l/ vi.& vt.（使）康复；（使）化解27. tissue /'tiʃu:/ n.（生物）组织；薄的织物；手巾纸28. swell /swel/ vi.& vt.（使）膨胀；隆起29. swollen /'swəulən/ adj.肿胀的30. blister /'blistə/ n.水泡vi.& vt.（使）起泡31. watery /'wɔ:təri/ adj.（似）水的32. char /tʃɑ:/ vi.烧焦33. nerve /nə:v/ n.神经；胆量34. scissors /'sizəz/n.（pl.）剪刀35. unbearable /ʌn'beərəbl/ adj.难以忍受的；不能容忍的36. basin /'beisn/n.盆；盆地37. squeeze /skwi:z/ vt.& vi.榨；挤；压榨38. bandage /'bændidʒ/n.绷带39. infection /in'fekʃn/ n.传染；传染病；感染40. vital /'vaitl/ adj.至关重要的；生死攸关的41. symptom /'simptəm/ n.症状；征兆42. label /'leibl/ vt.加标签或标记；分类n.标签；标记43. kettle /'ketl/ n.（水）壶；罐44. pour/pɔ:(r)/ vt.& vi.倒；灌；注；涌45. wrist /rist/ n.手腕46. damp /dæmp/ adj.潮湿的47. sleeve/sli:v/ n.袖子48. blouse /blauz/ n.女衬衫49. tight /tait/ adj.牢的；紧的；紧密的50. tightly /taitli/adv.紧地；牢牢地51. firm/'fə:m/ adj.（动作）稳定有力的；坚定的52. firmly /'fə:mli/adv.坚固地；稳定地53. throat /θrəut/ n.咽喉；喉咙54. ceremony /'seriməni/ n.典礼；仪式；礼节55. bravery /'breivəri/ n.勇敢；勇气56. stab /stæb/ vt.& vi.刺；戳；刺伤57. treat /tri:t/ vt.& vi.治疗；对待；款待n.款待；招待58. apply /ə'plai/ vt.涂；敷；搽；应用；运用vi.申请；请求；使用；有效59. pressure/'preʃə/ n.压力；挤压；压迫（感）60. ambulance/'æmbjuləns/ n.救护车61. scheme /ski:m/ n.方案；计划62. bruise /bru:z/ n.& vi.瘀伤；擦伤【重点短语】1.give / offer / do first aid to sb. 对某人急救2.perform / carry out first aid on sb. 对某人实施急救3.get injured/infected/burned 受伤/感染/烧伤4.save one’s life 挽救某人的生命5.electric shock 触电；电休克6.take off 脱下；（飞机）起飞7.squeeze out 榨出；挤出8.over and over again 反复；多次9.in place 在适当的位置；适当10.put one’s hands on 找到11.present sth. to sb. 赠予/ 给予某人某物12.a piece of jewellery 一件珠宝13.cause / do damage to…. 危害……14.stick sth. to… 把某物贴在……上15.make a difference 有影响【重点句型】1. Burns are called first degree, second degree or third degree burns depending on which layers of the skins are burnt.根据皮肤烧伤的层次分为一度烧伤、二度烧伤和三度烧伤。
高中英语人教新课标必修五unit5 单词讲解
nerve n. 神经, 勇气；魄力；胆量 a man of nerve 勇敢的人,有勇气的人 (pl) 神经质；神经过敏 She gets nerves before every examination. 每次考试前她都很紧张。
(拥有）个人空间是健康生活所必需的。 the essentials of grammar 语法要点 essentials/necessities of life
organ n. 器官 The eyes are the organs of sight. 眼睛是视觉器官. The liver is an organ and so is the heart. 肝脏是一个器官,心脏也是。 state organs 国家机构 organic adj. 器官的, 有机的, 组织的 organic vegetables 有机肥料灌溉的蔬 菜
choked up with traffic. 市中心的街道被车辆 堵塞了.
Give blood blood pressure He lost a lot of blood in the accident. Of noble blood They are of the same blood. He is of mixed blood. Blood for blood. Bad blood between A and B one’s own flesh and blood give sb. A bloody nose
Get on sb’s nerves刺激或烦扰某人 Stop whistling! It’s/You’re getting on
my nerves.
人教版必修五unit5-单词知识点教案
人教版必修五u n i t5-单词知识点教案Unit 5 First aid1.aid n. vt.帮助；援助；资助with the aid of…在……的帮助下 in aid of sth/sb.以支援或帮助某物/某人be a great aid to sb 对某人有极大的帮助come to one’s aid来帮助某人 first aid急救 aid sb in sth/doing sth在某方面帮助某人 aid sb to do sth帮助某人做某事 aid sb with sth在某方面帮助某人(1)We’re collecting money in aid of cancer research.(2)He aided me in business/with money.(3)My professor aided me to continue my study.(4)This new medicine may aid your recovery.(5)A dictionary is an invaluable aid in learning a new language.(6)We’re collecting money in aid of cancer research.(7)He aided me in business/with money.(8)This new dictionary is a great aid to me.(9)He was too busy to come to my aid.(10)They are collecting money in aid of rare-earth research.(11)With the aid of a compass, the traveller can find his direction.(12)Thank you for aiding me in/with the work.2.fall ill生病；病倒 fall asleep 睡着 fall silent安静下来fall in love with…爱上…… fall to pieces崩溃fall down摔倒fall behind落后，落在……后fall off质量下降；跌落；减少 fall over倒下；摔倒(1)She had to stay at home because her son fell ill.(2)They fell in love with each other at first sight.(3)It took him a long time to fall asleep.(4)Babies often fall down when they learn to walk.(5)His mother has been ill for a month.(6)I must have fallen asleep because it took me a long time to realize that the telephone was ringing.(7)He fell asleep while watching TV.(8)He didn’t want to fall behind others in his studies.(9)Having been working too hard in the last few months, he fell ill suddeny.3.injury n. [c,u]损伤；伤害 do an injury to对……造成伤害 injure vt.伤害；损伤 injured adj. 受伤的；受损伤的 the injured 伤员；受伤的人 injure强调对身体的伤害，多指在意外事故或天灾中受伤，有时也用于指对精神的伤害。
高中英语人教新课标必修五unit5知识点课件
This essay compares two different viewpoints on a topic and includes balanced analysis, clear comparison, and strong conclusion.
06
Practice and consolidation
Multiple Choice Questions
总结词
帮助学生理解课文内容，巩固所学知识。
详细描述
Multiple Choice Questions是一种常见的练习题型，通过选择正确答案来帮助 学生理解课文内容，巩固所学知识。这种题型可以考察学生对知识点的掌握程 度，提高他们的理解和记忆能力。
定义
表示过去发生的事情对现在的影响或结果。
结构
have/has + 过去分词。
例句
I have finished my homework. (我已经完成了作业。)
passive voice
1 2
定义
表示动作的接受者是主语，而不是动作的执行者 。
结构
be + 过去分词。
3
例句
The book was written by him. (这本书是他写 的。)
01
Unit Overview
Unit Theme
The unit theme is "Global Understanding", aiming to introduce students to different cultures, values and perspectives through exploring global issues and events.
人教版高二英语必修五unit5知识点
必修五unit5知识点详解1 Aid (v)帮助; 援助=help sbaid sb to do帮助某人去做….aid sb in doing…在…事帮助某人with the aid of 在某人的帮助下in aid of 为了帮助… come to sb.'s aid 帮助某人a hearing aid 助听器teaching aids 教具 medical aid 医疗救护2. temporary 暂时的，临时的temporary work/ solution临时工作/解决办法3. fall ill fall+ adj. ( fall ill/ asleep/ awake/sSick/ silent )4 get+过去分词表被动或状态The computer got damaged when we were moving.My bike is getting repaired now.My glasses got broken while I was playing basketball.Peter and Mary got married last year.get injured受伤get married结婚 get infected被感染get lost迷失，走失5 injure v.Injury( n) injured(adj) the injured do an injury to sbhurt肉体，精神上的伤害（一般用语），疼痛injure意外或事故而受伤wound指外伤（刀、枪、剑伤）6. bleed-blood-bloody(v.) (n.) (adj.)His nose was bleeding. = He was bleeding at the nose .= He has a bloodynose. 他在流鼻血。
bleed to death出血过多而死lose blood流血、失血bleed for为…而流血, 悲痛flesh and blood血肉之躯8.essential adj. 最重要的，不可缺少的，本质的1)Sun and water are essential to the growth of crops.阳光和水是农作物生长不可缺的。
人教新课标高中英语必修5 Unit5重点知识点汇总
人教新课标高中英语必修5 Unit5重点知识点汇总Unit 5 First Aid核心词汇1. aid n.& vi.帮助；援助；资助vt.& n.帮助；援助；救助They aided flood victims.他们援助遭受水灾的灾民。
They aided in solving the problem.他们帮忙解决这个问题。
【常用结构】first aid 急救aid sb. 帮助某人aid sb. with sth. 帮助某人(做)某事in aid of 支持;为……筹措aid sb. in (doing) sth. 在……方面帮助某人【联想拓展】表示一般意义的“帮助”或“援助”时，aid 是不可数名词；表示具体意义的“助手”、“辅助用品”时，aid是可数名词。
如：A dictionary is an important aid in learning a new language.(字典是学习一种新语言的重要工具)。
用作动词时，搭配为aid sb. to do sth.帮助某人（做）某事(其中的to 不可省略)，也可用于aid sb. in doing sth.帮助某人(做)某事。
【易混辨析】aid/help/assistanceaid 表示经济或其他方面给予的帮助或援助，多指强者(或足够者)援助弱者，多用于团体。
help 指给人精神或物质上的帮助，强调受助者的需要，有利于达到一定的目的或目标。
assistance 多指个人给予道义、知识、物质等方面的帮助，所提供的帮助往往只起辅助作用。
2. injury n.损伤；伤害Many common injuries happen every day in the home.家庭中每天都有许多常见的意外伤害。
【常用结构】do sb. an injury 伤害某人be an injury to sb./sth. 伤害；危害某人/某事escape injury 免受伤害repair injury 赔偿损害serious/severe injuries 重伤a slight injury 轻伤In the crash he suffered severe injuries to the head and arms.在事故中他头部和双臂受了重伤。
人教版高二英语必修五课件：Unit5+First+aid课文知识点+(共26张PPT)
① She appeared at the party wearing some of
her finest________.
A. jewels
B. jewelleries
C. jewel
D. jewellerys
② I want to buy ____ as a birthday gift for my daughter.
多 次
many times
repeatedly
有 now and then 时
now and again
time and again
sometimes
time and time again
11. Hold the bandage in place with tape. 用胶布把绷带固定。
in place在适当的地方。 如： •The librarian put the returned books in place. 图书馆员把还回的图书放到原处。 •You’d better put things back in place. 你最好把你的东西放回原位。
3） fall ill 生病，病倒，其中fall 为连系动词
fall + adj. 睡着了 ___f_a_ll_a_s_le_e_p__ 静下来 ___fa_l_l s_i_le_n_t____ His son suddenly _f_e_ll_ _il_l _ last week. 他儿子上周突然生病了。
1) Ellen has got a temporary job. 艾伦找到一份临时工作。
2) first aid 急救 give/offer/do first aid First aid is of great help in our daily life. 急救在我们的日常生活中帮助很大。
人教版必修五unit 5 Word讲解
改错：
③Under the aid of the doctor, Joe was back on his feet again.
Under→With
injury n．损伤；伤害；伤口
aid sb.in (doing) sth. 在某方面帮助某人
aid sb.with sth. 以某物帮助某人
aid sb.to do sth. 帮助某“急 救，帮助”；用作 可数名词时，则意 为“辅助性的工 具”。
语法填空：
①Mrs. Coxen was aided (aid) in looking after the homeless children by her friends last year.
vary from...to... 从……到……不等；在……到……之间变动
squeeze vt.& vi.榨；挤；压榨
squeeze...out of...从……榨取……；向……勒索/敲诈…… squeeze in挤进 squeeze out挤出 squeeze...into...把……挤入/塞进……
squeeze through挤着通过
语法填空：
1.We squeezed the juice from an orange. 2.There were already many people in the lift, but he tried to squeeze in . 3.They squeezed too many people into the bus.
1.Mary took the place of Tom to arrange the meeting which would take place in the company.
高中英语必修5第五单元重点、难点
高中英语必修5第五单元重点、难点Unit Five First Aid1、aid(1) 辅助工具；有助的东西A dictionary is an important aid in learning a new language.字典是学习新语言的重要工具。
(2) 帮助；援助With the aid of a neighbor, he managed to put out the fire.在邻居的帮助下，他把火扑灭了。
(3) vt.帮助 aid sb to do sth / in doing sthI aided her to work out the problem. 我帮助她解出了那道题。
aid help, assist, “帮助”的区别help 语气较随便。
满足被帮者的迫切需要、麻烦或危险，自己没有办法。
帮助者往往出于好意、同情或仁慈。
assist 意为辅助。
强调辅助者所起的作用，所进行的工作往往是次要的；辅助者本身也处于从属地位。
aid 意为援助。
比help正式。
暗含被帮一方是弱者之意。
My mother is deaf so she has to use a hearing aid.The young nurse was very nervous when she assisted in her first operation.2、The skin is an essential part of your body and its largest organ.(p33)皮肤是身体必不可少的部分，也是身体的最大器官。
关键透析essential adj. 必要的，基本的，本质的Hard work is essential to success. 成功必须努力工作。
It is essential to know all the facts. 了解所有的事实是必要的。
联想拓展be essential for/to…对……来说是必要的Water is essential to the growth of crops. 水对庄稼生长是必要的。
人教课标版高中英语必修5 Unit5_单元知识图谱
Slade's life. 毫无疑问，是约翰敏捷的思维和在学校学到的急救技术挽救了斯莱德女士的生命。
功能交际 指示（Giving instructions)
必备语法 省咯（Ellipsis)
2 /2
ankle n. 踝（关节）
vital adj. 至关重要的；生死攸关的
choke vi. &vt. （使）噎住；（使）窒息
symptom n. 症状；征兆
cupboard n. 橱柜；衣柜
1abel vt. 加标签或标记；分类 n. 标签；标记
skin n. 皮；皮肤
kettle n. （水）壶；罐
bleed vi. & t. （bled,bled)流血
basin n. 盆；盆地
nosebleed n. 鼻出血；流鼻血
squeeze vt. & vi. 榨；挤；压榨
sprain vt. 扭伤
bandage n. 绷带
sprained adj. 扭伤的
infection n. 传染；传染病；感染
3. It was John's quick action and knowledge of first aid that saved Ms Slade's life. 正是约翰快捷的动作和关于急救的知识救了斯莱德女士的命。
4. There is no doubt that John's quick thinking and the first aid skills he learned at school saved Ms
毫无疑问是约翰敏捷的思维和在学校学到的急救技术挽救了斯莱德女士的生命
项目 核心单词
人教版高中英语必修5 精品备课：Unit5 重点知识详解
精品备课：Unit5 重点知识详解重点单词aid【原句回放】First aid is a temporary form of help given to someone who suddenly falls ill or gets injured before a doctor can be found. 急救是在医生到来之前对突然生病的人或受伤者的一种暂时的救助。
【点拨】aid n./ vt.援助，救助，帮助1. 用作名词的aid，还可以表示“有帮助的事物”或辅助手段等。
An English dictionary is an important aid in learning English.英语词典是重要的学习英语的工具。
Teachers give their lessons with th e aid of computers. 老师们借助于计算机讲课。
He raised money in aid of the sick. 他筹款帮助病人。
2. 用作动词的aid：常用搭配：aid sb in/ with sth. 在某事上帮助某人aid sb. to do sth. 帮助某人做某事I aided the people who suffered from the big earthquake with money.我用钱来援助在地震中受灾的人们。
Vitamin C aids in the absorption of iron. 维生素C有助于铁的吸收。
We’ve aided him to finish the work ahead of time. = We’ve aided him in finishing the work ahead of time. 我们已帮助他们提前完成了工作。
【拓展1】常用含aid的短语：first aid 急救；in aid of 用于援助with the aid of 借助于give / offer aid 援助come to sb’s aid 帮助某人cut off aid (突然) 终止援助medical aid 医疗救护 a hearing aid 助听器teaching aids 教具【拓展2】辨析：aid, assist，help1. aid指受助者处境困难或危险，急需“援助”或“救助”，常用于aid sb. in/ withsth.结构。
人教版英语必修五book5unit5知识点_2022年学习资料
二、word formation-1.injure v.injured-adj.-injury-n.-2. oisonn./v.-poisonous-3.vary v.-various-adj.各种各样的varie y-4.bear v.-bearable-adj可忍受的-unbearable-adj难以忍受的-5.ti htadj.-tightly-adv.-6.firm adj.-firmly-treatment-7.br ve adj.-braveryn.-8.treat v.-9.apply v.applicant-n.申请 pplicationn.申请-10.press v.-pressure-11.bleed v.-bledbled-过去式/过去-分词blood-bloody
1.basinH2.bandage3.symptomB-4.kettleE5.dampD-6.sleeve 7.throat A8.ceremony J-9.ambulanceC10.firm-·A.喉咙B.症状 征兆C.救护车D.潮湿的-E.壶，灌-·F.袖子G.绷带H.盆，盆地-.稳定的，-坚定的J.典礼，仪式
Unit5 First aid-Language points
Vocabulary--Please translate the Chinese into English -1.毒药，使中毒-n./v.-poison-2.使膨胀，隆起-swell-3榨，挤，压榨-squeeze 4.倒，灌，注，涌pour-5.治疗，对待，款待-treat-6.涂，敷，应用，申请-apply-7.对伤 者的急救first aid-8.生病fall ill-9.触电，电休克-electric shock-10 榨出，挤出-squeeze out-11.反复，多次-over and over again-12.在适当 位置，适当-in place-13.若千，许多-a number of-14.找到put one's ha ds on-15.区别对待，有影响，起作用make a difference
新课标必修五unit5重难点解析
新课标必修五unit5重难点解析新课标必修五unit5重难点解析人教新课标必修五unit5重难点解析一、重点单词1. treatment ①不可数名词“ 对待, 待遇,处理; 治疗The workers received good treatment from the government. 工人们受到政府优厚的待遇.②可数名词“ 疗法”They are trying a new treatment for cancer.知识拓展be under treatment 在治疗中be under one’s treatment 接受某人的治疗for treatment 进行治疗treatment for + 疾病的名词治…病的.方法2. sensesense of touch 触觉 sense of sight 视觉sense of hearing 听觉 sense of taste 味觉sense of smell 嗅觉 sense of humor 幽默感sense of beauty 美感 sense of direction 方向感sense of honor 荣誉感 sense of values 价值观sense of justice 正义感 sense of hunger 饥饿感sense of responsibility 责任感the sixth sense 第六感 make sense 有道理;讲得通2.present n.礼物 ,目前 adj.在场，出席，当前的v.颁发，授予，赠给present sth. to sb. 授予/赠给某人某物present sb. with sth 授予/赠给某人某物at present 目前;现在for the present 暂时;暂且be present at 出席;到场3.dress v.敷裹，包扎E.g. Immediately after his wound was dressed, he went to work.知识拓展dress sb. /oneself 给…穿衣服be dressed in 穿着….. (颜色)dress up (as) 盛装打扮 ( 成….. )1. Tom had to return to the camp to_____ his injuries.2. _______white/a white coat, Mary went to the party.3. We _________to take part in the party.Key: 1 dress 2. Dressed in 3. dressed up4. swell v. 膨胀，隆起Her leg has swollen badly.她的腿肿得很厉害。
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人教版英语必修五u n i t5知识点必修五unit5知识点详解1 Aid (v)帮助; 援助=help sb帮助某人去做…. aid sb to do在…事帮助某人aid sb in …He aided me in business.I aided her to continue her study.At Christmas, many organizations aid the poor.n /U/帮助; 援助在某人的帮助下with the aid of为了帮助… in a id ofTeachers give their lessons with the aid of computers. He raised money in aid of the sick.知识拓展：give/offer aid 援助come to sb.'s aid 帮助某人cut off aid （突然）终止援助a hearing aid 助听器teaching aids 教具medical aid 医疗救护2. temporary 暂时的，临时的temporary relief from pain短暂的解痛temporary work/ solution临时工作/解决办法3. fall illfall+ adj.illasleepawakesicksilent4 get+过去分词表被动或状态The computer got damaged when we were moving. My bike is getting repaired now.My glasses got broken while I was playing basketball. Peter and Mary got married last year.get doneget injured受伤get dressed穿衣服get damaged遭到破坏get changed 改变get married结婚get infected被感染get broken被弄破get lost迷失，走失5 injure v.injury to sth. …（部位）的伤injuries to the legsgot injuredinjuryinjuredhurt肉体，精神上的伤害（一般用语），疼痛injure意外或事故而受伤wound指外伤（刀、枪、剑伤）6. bleed-blood-bloody(v.) (n.) (adj.)His nose was bleeding. = He was bleeding at the nose .= He has a bloodynose. 他在流鼻血。
bleed for为…而流血, 悲痛bleed to death出血过多而死lose blood流血、失血flesh and blood血肉之躯7. choke vi. & vt. 窒息; 阻塞She choked with emotion. 她激动得说不出话来。
The smoke almost choked me. 烟呛得我几乎喘不出气来。
At the bad news, he couldn't choke back his tear听到这则噩耗，他抑制不住自己的眼泪。
The man gave a few chokes and then got his breath.那个男人噎了几下才喘过气来。
8.essential adj. 最重要的，不可缺少的，本质的1)Sun and water are essential to the growth of crops.阳光和水是农作物生长不可缺的。
2)It is essential for us to set our study goal.我们有必要来设定我们的学习目标。
3)It is essential that you (should) win the voter's hearts.赢得选民的信任是至关重要的。
-----当用it充当主语而用它充当表语时，that 从句的谓语动词用should +动词原形。
9. You have three layers of skin which act as a barrier against disease,…act as 作为….barrier 屏障,障碍物,隔阂You should show the ticket at the barrier.The language barrier10 poison n./vt. 毒药，毒害；毒害，使中毒eg:1)Poisons must be put out of children’s reach.毒药一定要放在孩子们够不到的地方。
2)This matter will make some poison to the crops.这种物质会对庄稼造成毒害。
3)Books of this kind can make poison to children.这类书会对儿童造成毒害。
4)Heroin has poisoned a lot of people.海洛因毒害了很多人。
5)The polluted water in the river poisoned people here.污染了的河水使这儿的人中毒。
-----poisonous adj. 有毒(害)的eg: This medicine is poisonous if taken in large quantities.11.protect…against/ from…保护…不受…的损害prevent…from doing阻止．．．protect your eyes from strong lightto protect you against coldprevent them from getting marriedprevent sb. (from) doingstop sb. (from) doingkeep sb. from doing12. sense (n. & v.)five senses：sense of smellsense of hearingthe sixth sensesense of touchsense of sightsense of tastesense of humour、duty、directionThe man has no common sense . (无常识)What he said made no sense.(没道理)sense (v.) 感觉到Although she didn’t say anything, I sensed that she didn’t like the idea.(我感觉到她不喜欢这个主意）13.So as you can imagine, if your skin gets burned, it can be very serious. 该句是一个主从复合句，主句为：So if your skin gets burned, it can be very serious；从句为：as you can imagine.as引导非限制性定语从句，指代后面的内容，有“正如……”或“就象……”的意思；它所引的从句位置较灵活，可以位于句首、句中或句末。
另外，该句的主句中还含有一个if引导的条件状语从句。
请看类似的句子：As you can see, if they are not properly protected, the farmlands will become desserts sooner or later.正如你所看到的，这些农田如果保护不当迟早会变成沙漠。
as we all know = as is known to allas we expect = as is expectedas everybody can seeas you can imagine14.various 不同的，各种各样的There are various colors to choose from.vary vi 1.～(in sth)——be different in size, volume, strength, etc(体积、容积、力量等)呈现不同Opinions vary on this point.15. vary ～(with sth); ～(from sth to sth)——change , esp according to some factor改变, 变动, 变化（尤指伴随某种因素而产生）Prices vary with seasons. 物价随季节而变动Her mood varied from optimism to extreme depression. 她的情绪由乐观一变而为极度消沉variety n. 变化，多样性，种类We all need variety in our diet. 我们都需要饮食多样化The shopping center sells a variety of goodsa variety of+名词,谓语动词的数和后面的名词保持一致16.depend on取决于,依赖,依靠,信赖,信任His whole family depends on him他全家都靠他养活.He is a man to be depended on他是个可以信赖的人dependent ( adj. )dependence ( n. )independent ( adj. )independence (n.)17. mild-milder-mildest-mildlyExamples include mild sunburn and burns caused by touching a hot pan, stove or iron for a moment.mild在这个句子中的意思是“轻微的、不严重的”。
如：Edward suffered from a mild heart attack.爱德华犯了轻微的心脏病。
mild还可以表示“温和的、暖和的；味淡的”如：She’s the mildest person I have ever met in my life. 她是我平生见到过的最温柔的人了a mild climate 温暖的天气mild cheese 淡味奶酪18. 词语辨析:electric电的,发电的,由电产生的,用于导电的.electrical有关电的,与电有关的.electricity电,电力. 电力学electric generator 发电机, electric cooker 电炉,electric iron 电熨斗, electric engineer 电机工程师19.swell vt./vi. Swell swelled/ swelled swollen使膨胀，使(力量，数目等)增长，使壮大，The wind swelled the sails. 风使船帆鼓起。