Unit 6 Period 4 课时学案 单元语法讲练(Using language)-【名师导航】2026-2027学年高中英语必修第二册教师用书word（外研版）

本讲义聚焦动词-ing形式和动词-ed形式作宾语补足语核心语法点，通过环保主题美文诵读引入实例，系统梳理两种形式与宾语的逻辑关系（主动/被动、进行/完成），结合感官动词、使役动词及with复合结构等应用场景，辅以词汇拓展和梯度练习构建学习支架。 资料以“语篇导入—语法解析—实践应用”为主线，将环保主题与语法学习融合，通过实例对比培养思维品质，多样化练习（单句填空、补全短文等）提升语言能力。课中助力教师高效授课，课后便于学生巩固知识、查漏补缺，兼顾文化意识与学习能力培养。

Period 4　 单元语法讲练(Using language) 动词-ing形式和动词-ed形式作宾语补足语 美文诵读 语法体悟 Now many species are currently facing the threat of extinction due to various human activities． We can see animals ①being hunted illegally，with their habitats ②being destroyed． For example，forests are being cut down，leaving many wild animals ③losing their homes． Some animals are found ④trapped in cages． To address this issue，many conservation organizations have been established． The organizers want these animals ⑤protected． Besides，the government should keep people ⑥learning about the need to protect these precious creatures． If we see someone ⑦damaging the environment where animals live，we should stop him．Let's make a joint effort to protect the animals and maintain the ecological balance of the earth． ①作宾语补足语，和宾语animals之间是被动关系。 ②作宾语补足语，和宾语their habitats之间是被动关系。 ③作宾语补足语，和宾语animals之间是主动关系。 ④作主语补足语，和主语Some animals 之间是被动关系。 ⑤作宾语补足语，和宾语these animals之间是被动关系。 ⑥作宾语补足语，和宾语people之间是主动关系。 ⑦作宾语补足语，和宾语someone之间是主动关系。 一、动词-ing形式和动词-ed形式作宾语补足语与宾语之间的关系 1．动词-ing形式作宾语补足语与宾语之间的关系 当作宾语补足语的动词与宾语之间是逻辑上的主谓关系且动作正在发生时，则用动词-ing形式表示正在进行的主动动作；当作宾语补足语的动词与宾语之间是逻辑上的动宾关系且动作正在发生时，则用being done表示正在进行的被动动作。 I heard her singing an English song when I passed by her room yesterday． 昨天我经过她的房间时，听到她正在唱英文歌。 I heard an English song being sung when I passed by her room yesterday． 昨天我经过她的房间时，听到有人在唱英文歌。 2．动词-ed形式作宾语补足语与宾语之间的关系 ①及物动词-ed形式作语宾补足语，表示被动与完成，与宾语之间是逻辑上的动宾关系。 I heard the door opened． 我听到门被打开了。 ②seat，hide，dress等动词-ed形式作宾语补足语，一般表示状态，不表示被动意义，与宾语之间是逻辑上的主谓关系。 When I came in，I found a strange girl seated in the corner． 我进来时发现一个陌生的女孩坐在角落里。 ③go，fall等少数不及物动词-ed形式作宾语补足语，仅表示完成，不表示被动，与宾语之间是逻辑上的主谓关系。 She found her necklace gone on her way home． 她在回家的路上发现项链不见了。 [名师点津]　上述句子变成被动语态后，宾语补足语就变成了主语补足语，说明主语的状态。 单句语法填空 ①He found himself lying (lie) in the hospital when he woke up． ②To his fright，he felt himself being followed(follow) by a wolf． ③I'm afraid I can't make myself understood(understand) due to my poor English． ④If she catches you reading(read) her diary，she will become angry． ⑤The manager was satisfied to see many new products developed (develop) after great effort． 二、常见动词-ing形式和动词-ed形式作宾语补足语的情况 1．用于感官动词或短语后，如see，watch，observe，look at，notice，find，discover，catch (当场发现)，hear，listen to，feel，sense (意识到)等。 They saw the water running down from the high mountain． 他们看到水从高山上流下来。 To learn English well，we should find opportunities to hear English spoken as much as possible． 为了学好英语，我们应该尽可能多地听别人说英语。 2．用于使役动词后，如have，get，keep，leave，make等。 He had us laughing by telling jokes all through the meal． 在整个就餐过程中，他一直讲笑话，让我们笑个不停。 I made myself known to them first and then we talked about our hobbies． 我先向他们做了自我介绍，然后我们谈论了自己的爱好。 [名师点津]　使役动词make，let后一般不跟动词-ing形式作宾语补足语，若作宾语补足语的动词与其前的宾语之间为主动关系时，用不带to的不定式。 The photographs made me recall my schooldays． 这些照片使我回想起我的学生时代。 3．用于with复合结构中 With so many people looking at her，she felt very nervous． 有那么多人看她，她感到很紧张。 With the problem solved，the quality has been improved． 问题解决了，质量也提高了。 [名师点津]　表示“意愿，命令”的动词，如like，want，wish，expect，order等，可用动词-ed形式作宾语补足语，相当于动词-ed形式前省略了to be，表示“希望/要求……被做”。 He didn't want the problem (to be)discussed at the meeting． 他不想在会上讨论这个问题。 完成句子 ①他很紧张，能够听到自己的心在狂跳。 He was so nervous that he could hear his heart beating wildly． ②他只有用最大音量喊，才能让别人听见。 Only by shouting at the top of his voice was he able to make himself heard． ③我们发现，由于改革开放政策，我们的国家变化很大。 We found our country changed greatly with the reform and open policy． ④约翰收到了一封晚宴邀请函，因为工作都完成了，他欣然接受了邀请。 John received an invitation to dinner，and with his work finished，he gladly accepted it． 1．(教材原句)Now，she is a model and performance artist devoted to ocean conservation． *devote v．致力，献身，倾注(devoted adj．挚爱的；忠诚的；devotion n．深爱；奉献) (1)devote to 　 致力于；献身于 devote sth．to (doing)sth．　 把……献给；致力于 devote oneself to　 致力于；献身于；专心于 (2)be devoted to (doing)sth．　 献身于(做)某事；专心致志于(做)某事 单句语法填空/句式升级 ①He always devotes his attention to helping (help) the homeless children． ②We appreciated his devotion (devote) of time and money to the project． ③The young lady is devoted to teaching the deaf children，and she has little time to care for her own daughter． →Devoted to teaching the deaf children，the young lady has little time to care for her own daughter．(过去分词短语作状语) →Devoting herself to teaching the deaf children，the young lady has little time to care for her own daughter．(动词-ing形式短语作状语) 2．(教材原句)Hello from Sanjiangyuan National Nature Reserve (SNNR)． *reserve n．(野生生物)保护区；贮存v．保留；贮存；预订[reservation n．保留；预订(房间、座位等)] (1)without reserve　 毫无保留地；完全 keep sth．in reserve　 保存某物以备用 (2)reserve sth．for sb．　 为某人保留某物 reserve the right to do sth．　 有做某事的权利 (3)make a reservation　 预订(座位、房间等) 单句语法填空/单句写作 ①Say all you know and say it without reserve． ②A double room with a balcony has been reserved for him． ③I'd like to make a reservation(reserve)for two nights for my family and myself in this hotel． ④(应用文写作之建议信)你最好保留一些备用金，以防万一。 You'd better keep some money in reserve，just in case． 3．(教材原句)We've also seen droughts and floods caused by these changes，which affect the water supply downstream． *affect v．影响；打动；(疾病)侵袭(effect n．作用；影响；结果) (1)be affected by　 受……影响；被……感动 be affected with a high fever　 发高烧 (2)in effect　 事实上 have an effect on　 对……有影响 单句语法填空/单句写作 ①Affected(affect)by the rise of house prices，people in big cities live under great pressure． ②We want to know whether the drug has an effect on people's health． ③Favorable policies are in effect to encourage employees' professional development． ④(读后续写之人物介绍)他因发高烧而感觉不舒服。 He was affected with a high fever so he didn't feel himself． 4．(教材原句)This includes keeping the original environment from being touched，as well as adopting new，sustainable ways of feeding farm animals． *adopt v．采取(某种方法)；收养(adopted adj．领养的；adoption n．采用；收养) adopt an idea/a plan　 采纳意见/计划 adopt measures　 采取措施 单句语法填空/单句写作 ①She treated her adopted (adopt) son as if he were her own child． ②If you cannot have children of your own，why not consider adoption(adopt)? ③(应用文写作之回复信)现在，我写信告诉你我最近采用的学习英语的方法。 Now I'm writing to tell you the way to learn English I have adopted recently． 5．(教材原句)Reduce waste by choosing reusable products—get a reusable water bottle，for example． *reduce v．减少，降低 (1)reduce...to...　 把……减少到…… reduce...by...　 把……减少了…… reduce sb．to tears　 使某人流泪 (2)be reduced to (doing) sth．　 沦落到……地步 单句语法填空/单句写作 ①(应用文写作之环境保护)To improve the air quality，the use of private cars should be reduced(reduce)． ②(应用文写作之人物介绍)With great effort，she has reduced her weight by five kilograms in the past 7 weeks． ③(读后续写之心理描写)听到这个消息，她在父母面前流下了眼泪。 Hearing the news，she was reduced to tears in front of her parents． 课时提升作业(十七)　(Unit 6　Using language) (建议用时：45分钟　总分：99分) Ⅰ．品句填词(共8小题；每小题1.5分，满分12分) 1．The staff (员工) are not very happy about the latest pay increase． 2．The plane reduced(降低) speed as it approached the airport． 3．The bears are eventually released(释放) into the wild． 4．She devoted(致力，献身) herself full-time to her growing business last year． 5．When applying for a job，you should highlight(使……突出) your experience and skills． 6．Our goal is to establish(建立) a new research centre in the North． 7．This nature reserve (保护区) has had a lot of work done recently in order to help the butterflies． 8．Today，sustainable(可持续的) development is a popular trend in many countries． Ⅱ．单句语法填空(共7小题；每小题1.5分，满分10.5分) 1．I was sleeping when I heard my name called (call)． 2．We had some photos taken(take) in the park last weekend． 3．Hearing the telephone ringing，she rushed out of the kitchen and left the water boiling(boil)． 4．They kept the door locked(lock) for a long time． 5．The first time we stayed there，we heard the chug-chug-chug of a motorbike making (make) its way down the hill toward us． 6．I caught her stealing(steal) in the bookshop． 7．Hands waving，I dashed towards the bird，yelling to make myself noticed (notice)． Ⅲ．完成句子(共5小题；每小题2分，满分10分) 1．他看到一些树正在被砍伐时，就去阻止那些人。 When he saw some trees being cut down，he went to stop the people． 2． 当女孩注意到那个人离开舞会时，她马上开始跟踪他。 When the girl noticed the man leaving the party，she began to follow him immediately． 3．经理让我们在他的办公室里等了一个小时。 The manager had us waiting in his office for an hour． 4．我从未听到这首歌在我们学校唱过。 I have never heard this song sung in our school． 5．一位老人被发现躺在地上，然后就急忙被送往医院。 An old man was found lying on the ground and then rushed to the hospital． Ⅳ．补全短文(共7小题；每小题2分，满分14分) With 1．everything finished(一切都完成了)，I went to the park． In the park，I 2．saw the leaves dancing in the wind(看到树叶在风中舞动)，their green color shining brightly in the sunlight．I 3．heard the birds singing merrily(听到小鸟在快乐地唱歌) on the branches，their voices filling the air with joy．I 4．found an old man reading a newspaper(发现一位老人在读报) on a bench． Nearby，I 5．noticed a group of children playing games(注意到一群孩子在玩游戏)，their laughter echoing around．Besides，when I passed a pond with 6．fish swimming in it(鱼在里面游)，I 7．saw the fish being fed by some people(看到鱼正在被一些人喂食)． Ⅰ．阅读理解(共4小题；每小题2.5分，满分10分) Nowadays，taking no notice of protecting the environment leads to problems including global warming．While discussing the matter of going green with my daughter，I remembered the daily practices in most households in India．What we did was actually helping our environment and also protecting our resources．We did all this naturally，without even realizing its importance． We preferred reusing pens in the past．We used to have ballpoints used again and again by changing the refills and we also used ink pens，which were refreshed now and then by filling ink in them when required．There was no such thing as a use-and-throw pen．We loved the process of cleaning the writing instruments．However，today，plastic pens that do not last long are ruling the stationery stores(文具店)． We recycled and reused newspapers without really thinking twice about it．Newspapers were kept carefully during those days because they were important materials used for packing and storing things．Today plastic bags have become important．These materials pollute our land and water and prevent all conservation(保护) efforts． Public transport was a common thing in the old days and it was so much fun．Nowadays，many people seem not to have the patience to take public transport and some people even consider it too silly for them．A lot of people go by car every day and pollute the environment，thinking it makes them look cool．Vehicular(车辆的) pollution in cities is the biggest contributor to environmental problems． I am not against the usage of modern technology．In fact，it has helped make our life easier．While we can use technology to go green instead of polluting the environment，we should also go back to a few old traditions that are eco-friendly． 【语篇解读】　本文是一篇议论文。文章认为，无论是过去还是现在，人们都应该保护环境，并且人们应该重新采用一些传统的环保方式。 1．How many daily practices are mentioned in the text? A．One．　　 B．Two． C．Three．　 D．Four． C　[细节理解题。根据第二段第一句“We preferred reusing pens in the past．” 、第三段第一句“We recycled and reused newspapers without really thinking twice about it．”以及第四段第一句“Public transport was a common thing in the old days and it was so much fun．”可知，文中提到了三个日常习惯。故选C。] 2．Which of the following may the author advise us to do? A．Use plastic bags． B．Go to school by bus． C．Use use-and-throw pens． D．Throw old newspapers away． B　[推理判断题。根据第四段中的“Public transport was a common thing in the old days and it was so much fun．”“A lot of people go by car every day and pollute the environment，thinking it makes them look cool．Vehicular pollution in cities is the biggest contributor to environmental problems．”可知，作者可能会建议我们乘公共汽车上学。故选B。] 3．What does the author want to do in the last paragraph? A．Summarize the above paragraphs． B．Add some background information． C．Introduce a new topic for discussion． D．Show some reasons to the readers． A　[推理判断题。通读全文可知，本文第一段引出话题，接下来的三段列举了三个例子，最后一段作者讲，虽然我们可以使用技术来保护环境而不是污染环境，但我们也应该重新采用一些传统的环保方式，由此可推知，最后一段的作用是总结全文。故选A。] 4．What may be the best title for the text? A．Follow Old Traditions B．Go Green Then and Now C．The Environment Is Worsening D．Modern Technology Is Harmful B　[标题归纳题。根据第一段的内容以及最后一段中的“While we can use technology to go green instead of polluting the environment，we should also go back to a few old traditions that are eco-friendly．”可知，B项“Go Green Then and Now(过去和现在都要大力保护自然环境)”为最佳标题。故选B。] Ⅱ．阅读七选五(共5小题；每小题2.5分，满分12.5分) Be a Green Child What does it mean to be green? “Green” is more than just a colour．　1　Why green? Plants are green，and without them the Earth wouldn't be such a lovely home for us human beings．Every day，people make choices that affect the amount of rubbish and pollution produced in our world．What can we do? Here's a four-step guide to being green： Reduce It! 　2　For example，a shorter shower means you use less water and less fuel since your house uses fuel to run the water heater that warms up the water． Reuse It! Sometimes people call ours a “throwaway society”．That means that we're a little too willing to throw away old things and buy new ones．　3　 For example，if your baby brother outgrows his plastic basketball hoop，why not give it to another family who has a little kid? Recycle It! Recycling has never been easier．Many communities will pick it up right in front of your house and some towns even require it．Recycled goods go to a recycling centre，where they can be turned into new cans，bottles，and paper． Enjoy It! It's true that rubbish and pollution are problems，but the Earth remains a huge and beautiful place that's ready for you to explore．　4　 Go for a hike，visit local nature centres and gardens，and climb up mountains．But before you travel the globe，take a look at your own backyard．Is there a place where you could plant a tree or put in a little fruit or vegetable garden？　5　 A．If so，get out there and get your hands dirty． B．Turn off the water tap when you're brushing your teeth． C．You can watch with pride as your garden plants grow． D．It also means taking special steps to protect the environment． E．When you use less of something，you do a good thing for the Earth． F．You can start locally by visiting the naturally beautiful places in your cities． G．Many times，even if you no longer need something，someone else just might need it． 【语篇解读】　本文是一篇说明文。文章主要讲述了环保的四个步骤。 1．D　[根据上文“‘Green’ is more than just a colour．”可知，Green不仅仅指颜色，设空处应表示它还有其他的含义，D项“它还意味着采取特殊措施保护环境”符合语境。故选D。] 2．E　[根据本段小标题Reduce It！和下文内容可知，本段主要讲述了通过节约来做到环保，E项“当你少用一些东西，你就为地球做了一件好事”符合语境，E项中的use less of something与小标题中的Reduce和下文中的use less water and less fuel相照应。故选E。] 3．G　[根据本段小标题Reuse It！可知，本段主要讲述了通过再利用物品来做到环保，G项“很多时候，即使你不再需要某个东西，但别人可能会需要它”讲述了你不需要的东西可能是别人需要的，建议将闲置物品送给有需要的人，承接下文，符合语境。故选G。] 4．F　[根据上文“It's true that rubbish and pollution are problems，but the Earth remains a huge and beautiful place that's ready for you to explore．”可知，地球上仍然有美丽的地方供你探索，空处应讲述可探索的地方，F项“你可以从当地开始，参观你所在城市中自然美丽的地方”符合语境。故选F。] 5．A　[根据上文“Is there a place where you could plant a tree or put in a little fruit or vegetable garden？”可知，询问了是否有种树、水果或蔬菜的地方，空处应进行回答，A项“如果有，那就出去把你的手弄脏吧”符合语境，建议行动起来去种植。故选A。] Ⅲ．完形填空(共15小题；每小题1分，满分15分) Children are not often invited to address the United Nations General Assembly (联合国大会)． But there stood Felix Finkbeiner，with a(n)　1　question about climate change． “We children know that adults are　2　the climate challenges and that they have the solutions，” he said． “But we don't understand why there is so little　3　．” Before his speech，Finkbeiner had been　4　 a remarkable environmental campaign for four years and it has since　5　into a global network of children working to　6　 the earth's warming by reforesting the planet． Most of them are between the ages 9 and 12． The reforesting effort could be traced to a fourth grade school　7　 in Finkbeiner's hometown． The topic was climate change． In his report，Finkbeiner　8　to plant one million trees in Germany． Finkbeiner's teacher was deeply impressed with the idea and asked him to　9　his report to other students and the headmaster． Of course，no one 　10　 anything to come out of it． But two months later，he planted his first tree，an unimpressive apple tree，near the entrance to his school． His campaign was a 　11　 and had a dramatic close． By the time he delivered his 　12　 at the UN in New York in 2011，at the age of 13，Germany had planted its millionth tree． “If I had known then how much international media coverage that apple tree would 　13　 ，” he says now，a little 　14　 ，“I would have insisted my mother buy a more 　15　 one．” 【语篇解读】　本文是一篇记叙文。文章主要讲述了Felix Finkbeiner为解决环境问题而种树的故事。 1．A．easy　　 B．political　 C．serious　　 D．awkward C　[根据后文Felix Finkbeiner说的话可知，气候变化是一个严肃的问题。故选C项。] 2．A．aware of　　 B．addicted to　 C．afraid of　　 D．curious about A　[根据前文“But there stood Felix Finkbeiner，with a(n) ________ question about climate change．”可知，成年人已经意识到了气候挑战。故选A项。] 3．A．permission　　 B．action　 C．water　　 D．luck B　[根据前文Felix Finkbeiner说的话可知，成年人意识到问题，也知道解决办法，但行动远远不够。故选B项。] 4．A．avoiding　　 B．planning　 C．advertising　　 D．leading D　[根据后文“a remarkable environmental campaign for four years”可知，Finkbeiner领导了一个了不起的环境运动。故选D项。] 5．A．expanded　　 B．broken　 C．run　　 D．looked A　[根据前文“Finkbeiner had been ______ a remarkable environmental campaign for four years and it has since”和后文“into a global network of children working to ______ the earth's warming by reforesting the planet”可知， Finkbeiner领导的环境运动，已扩展为一个全球儿童网络。故选A项。] 6．A．record　　 B．know　 C．slow　　 D．measure C　[根据后文“the earth's warming by reforesting the planet”可知，全球儿童网络致力于通过重新造林来减缓地球变暖。故选C项。] 7．A．play　　 B．assignment　 C．accident　　 D．object B　[根据前文“The reforesting effort could be traced to a fourth grade school”和后文“Finkbeiner's teacher...students and the headmaster．”可知，Finkbeiner四年级的一项作业是与重新造林有关的。故选B项。] 8．A．reduced　　 B．urged　 C．started　　 D．promised D　[根据后文“ to plant one million trees...to other students and the headmaster”可知，Finkbeiner在报告中承诺在德国种植100万棵树。故选D项。] 9．A．mail　　 B．contribute　 C．present　　 D．sell C　[根据前文“Finkbeiner's teacher was deeply impressed with the idea and asked him to”和后文“his report to other students and the headmaster”可知，Finkbeiner的老师对这个想法印象深刻，让他把报告展示给其他学生和校长看。故选C项。] 10．A．wanted　　 B．expected　 C．asked　　 D．needed B　[根据前文“no one”和后文“anything to come out of it...near the entrance to his school ”可知，没人期望这个植树计划会有什么结果，但Finkbeiner种下了第一棵树，开始了他的行动。故选B项。] 11．A．disaster　　 B．joke　 C．show　　 D．hit D　[根据后文“had a dramatic close”以及“By the time...had planted its millionth tree．”可知，他的植树运动大受欢迎，获得成功。故选D项。] 12．A．speech　　 B．tree　 C．evidence　　 D．package A　[根据前文“he delivered his”和后文“at the UN in New York in 2011”以及文章开头可知，13岁的Finkbeiner在纽约联合国发表演讲。故选A项。] 13．A．receive　　 B．miss　 C．highlight　　 D．grow A　[根据前文“If I had known then how much international media coverage that apple tree would”可知，Finkbeiner种的那棵苹果树受到很多的国际媒体报道。故选A项。] 14．A．forgetfully　　 B．unwillingly　 C．apologetically　　 D．regretfully D　[根据前文“‘If I had known then how much international media coverage that apple tree would ______ ，’ he says now，a little”和后文“‘I would have insisted...one．’”可知，Finkbeiner没有坚持让母亲买一棵更令人印象深刻的苹果树，感到很遗憾。故选D项。] 15．A．average　　 B．impressive　 C．severe　　 D．important B　[根据最后一段空前面的内容可知，Finkbeiner很遗憾自己没有坚持让母亲买一棵更令人印象深刻的苹果树。故选B项。] Ⅳ．语法填空(共10小题；每小题1.5分，满分15分) If you're one of those people planning to do something helpful in honor of Earth Day，you may be wondering what 1．________ (exact) you can do．We've got 10 great 2．________(way) to roll up your sleeves and get to work，whether you have five minutes，five hours 3．________ want to form habits that will last a lifetime． Since our cars are some of the 4．________ (great) sources of pollution in our daily lives，it makes sense to start there．Even if you have 5．______ short trip to work，driving to and 6．________ work could still be a major contributor to pollution．For example，a person drives 10 miles each way，7．________ means he consumes (消耗) about 1 gallon of gas for the round trip at least． But that single gallon of gas sends 20 pounds of carbon dioxide into the air．That's because 1 gallon of gas 8．________ (weigh) about 6.3 pounds and that produces 20 pounds of carbon dioxide when 9．______ (burn)．So by not burning that 1 gallon，you'll keep 20 pounds of green-house gas out of the air． So how will you get around? Consider 10．______ (take) the bus or train to work from home for the day，or riding your bike if possible．Then you'll be getting healthier with the planet． 【语篇解读】　本文是一篇说明文。文章主要介绍了为纪念地球日可以做的一些有益于地球的事情。 1．exactly　[考查副词。修饰动词应用副词，exact的副词为exactly，意为“究竟，到底”。故填exactly。] 2．ways　[考查名词复数。分析句子可知，此处为名词作宾语，结合上文的数字10可知，此处应为名词复数形式。故填ways。] 3．or　[考查并列连词。whether...or...为固定搭配，意为“无论……还是……”。故填or。] 4．greatest　[考查形容词最高级。根据句意以及空前the可知，此处为形容词最高级形式。故填greatest。] 5．a　[考查冠词。have a short trip为固定短语，意为“短途旅行”。故填a。] 6．from　[考查介词。to and from work为固定短语，意为“上下班”。故填from。] 7．which　[考查定语从句。分析句子结构可知，此处为关系代词which引导的非限制性定语从句，指代“a person drives 10 miles each way”，并在从句中作主语。故填which。] 8．weighs　[考查动词时态和主谓一致。分析句子结构可知，because引导的表语从句缺少谓语，结合主句系动词is和从句主语1 gallon of gas单数意义可知，此处应为一般现在时的单数形式。故填weighs。] 9．burned/burnt　[考查状语从句的省略。分析句子结构可知，when引导的时间状语从句和主句主语均为1 gallon of gas，从句谓语为is burned/burnt，此时可省略主语1 gallon of gas和be动词is。故填burned/burnt。] 10．taking　[考查非谓语动词。分析句子结构可知，此处为动词短语consider doing sth．“考虑做某事”。故填taking。] 1 / 1 学科网（北京）股份有限公司 $