资源简介 (共31张PPT)Unit 5 Amazing nature七年级外研2024版下语法讲解及专练解析形容词、副词比较级和最高级的构成语法精讲一、 形容词、副词比较级和最高级的构成构成方式 例词规 则 变 化 单音节和部分双音节词 一般在词尾加-er,-est small→smaller→smallestloud→louder→loudest 以不发音的字母e结尾的词,加-r,-st large→larger→largest 以两个辅音字母加一个元音字母结尾的重读闭音节词,双写词尾的辅音字母,再加-er,-est big→bigger→biggestearly→earlier→earliest 以"辅音字母+y"结尾的词,变y为i,再加-er,-est ugly→uglier→ugliestbusy→busier→busiest 少数以er或ow结尾的双音节词,词尾加-er,-est narrow→narrower→narrowest 多音节 其他双音节词和多音节词及分词形容词,在词前加more,most important→more important→most importantquickly →more quickly →most quickly不规则变化 bad/ill/badly→worse→worst;much/many→more→most;good/well→better→best;far→farther/further→farthest/furthest;old→older/elder→oldest /eldest;little→less→least 【易错警示】1. farther/farthest和further/furthest的区别:二者表示距离时,往往可互换,但是用于引申义,表示程度时,只能使用后者。He can throw much farther/further than you. 他可以比你扔得远得多。二、 形容词、副词比较等级的句式结构和用法1.A+be+形容词比较级than+B 表示一方超过或低于另一方的情况在比较级+ than的结构前可以加上某些副词类和表示倍数的词,以对其进行修饰,如:far(远), even(甚至), much(许多), still(更,还), a lot(许多), a little / bit(一点), rather(相当地), slightly(略微), not any(不再), three times(三倍)等。2.as+形容词/副词的原级+as 表示"……和……一样……"3. 比较级+and+比较级 表示"越来越……4. the+比较级, the+比较级 表示"越……,就越……5. A+be+形容词最高级of/in…表示"A在某范围内是最……的"6. no +比较级+ than的结构表示"A和B一样不……"。三、 方法技巧(一)1. 同级比较:同级比较用原形,as…as永不离;as…as加not,只言两者是同一,若是not so…as,后强前弱不看齐。2. 比较级与最高级:两者比较than相连,三者比较the在前。【妙语诠释】 ①同级比较一般用as…as表示"与……一样……",这时谁强谁弱无法比较出来,而not so…as则表示后者比前者强,翻译为"不如……";②比较级通常和than 连用,而最高级通常跟有定冠词the。(二)原级用在as…as间,比较级用在than前,and连接两个比较级,说明"越来越怎样"。三者以上最高级,副词前可不加the,even,much和a little,也常修饰比较级。(三)一者比较用原级。比较级限二者比。三者三者往上比,最高级的用法起。若将等级掌握齐,比较范围要搞细。比较级二句型记,做出句子没问题。若甲乙程度相同,as…as 结构体。甲某方面不及乙,用 not so/as…as表示。语法精练单项选择1.Exercising on the playground is as ________ as studying in the classroom.A.important B.more important C.the most important【解析】句意:在操场上锻炼和在教室里学习一样重要。考查形容词原级。important重要的,形容词原级;more important更重要的,比较级;the most important最重要的,最高级。根据“as...as”可知,需要形容词原级,故选A。2.Of all the rivers in China, the Changjiang River is ________A.long B.longer C.the longest【解析】句意:在中国所有的河流中,长江是最长的。考查形容词最高级。long长的;longer更长的,比较级;the longest最长的,最高级。根据“Of all the rivers in China”可知,这里对比的对象是中国所有的河流,应用最高级。故选C。3.— I’m getting a COVID-19 vaccine (接种新冠疫苗) this afternoon.—Everyone should take a vaccine, or we will be in even ________ danger.A.greatest B.greater C.smaller D.smallest【解析】句意:——我今天下午将去接种新冠疫苗。——每个人都应该接种疫苗,否则我们将面临更大的危险。考查比较级和形容词辨析。根据“even”是比较级修饰词可知,此处要用比较级,排除A、D项;great“极大的”;small“小的”。根据“or”表示“否则”可知,如果我们不接种疫苗,我们将面临更大的危险,因此每个人都因接种疫苗。greater符合语境。故选B。4.— How do you find the chat show on CCTV, Lucy — Wonderful! It’s the ________ program I’ve ever watched.A.better B.best C.worse D.worst【解析】句意:——露西,你觉得中央电视台的谈话节目怎么样?——太棒了!这是我看过的最好的节目。考查最高级。better更好;best最好的;worse 更糟糕的;worst最糟糕的。根据“Wonderful!”和“I’ve ever watched”可知,是看过最好的电影;故选B。5.Jogging is ________ than many sports, just get good running shoes.A.cheaper B.cheap C.cheapest D.the cheapest【解析】句意:慢跑比许多运动更便宜,只要买一双好的跑鞋就可以。考查形容词的比较级。cheaper更便宜的;cheap便宜的;cheapest最便宜的;the cheapest最便宜的。根据“than”可知,本句是含有比较级的句子。“便宜的”cheap,是形容词,其比较级是cheaper。故选A。6.The trip to Sydney is one that I have ever taken in the last twenty years.A.enjoyable B.more enjoyable C.the most enjoyable【解析】句意:这次悉尼之行是我在过去二十年中所去过的最愉快的一次。考查形容词最高级。根据下文“I have ever taken in the last twenty years”,可知表示较大范围,空处需用最高级;enjoyable“愉快的”是多音节形容词,最高级用“the most enjoyable”,故选C。7.—________ clever boy your brother is!—So he is. He is ________ in my family.A.What a; clever B.What a; the cleverest C.How; cleverer【解析】句意:——你弟弟是多么聪明的男孩啊!——他的确是。他是我家最聪明的。考查感叹句和形容词。clever聪明的;the cleverest最聪明的;cleverer更聪明的。感叹句的结构:What a/an+形容词+单数可数名词+主语+谓语;How+形容词/副词+主语+谓语;此处boy是单数可数名词,因此为what a引导的感叹句;根据“in my family”可知,此处比较范围在三者以上,因此用形容词的最高级。故选B。8.It’s well known that the Great Wall is one of ________ man-made wonders in the world.A.great B.greater C.greatest D.the greatest【解析】句意:众所周知,长城是世界上最伟大的人造奇迹之一。考查形容词最高级。根据“one of+the+最高级+名词复数”可知,此空需要形容词最高级,且最高级前面需要加上the。故选D。9.Putting out forest fire is regarded as one of ___________ problems in the world today.A.difficult B.more difficult C.most difficult D.the most difficult【解析】句意:扑灭森林火灾被认为是当今世界最困难的问题之一。“one of + the +形容词最高级+名词复数”为固定搭配,意为“……中最……之一”,符合句意,故选D。10.Tony eats a lot and never takes exercise. He becomes the ________ in his class.A.thinner B.thinnest C.heavier D.heaviest【解析】句意:Tony吃得多,从不锻炼。他成为班上最重的。考查形容词辨析及形容词最高级的用法。thinner较瘦的;thinnest最瘦的;heavier较重的;heaviest最重的。根据“Tony eats a lot and never takes exercise. He becomes the...in his class.”可知,此处表示Tony是班里最重的,应用形容词最高级表示。故选D。11.Wendy studies ________ than any other student in her class.A.hard B.harder C.hardest D.the hardest【解析】句意:温蒂比班上任何其他学生都用功。考查副词比较级。根据“than”可知,此处应使用比较级,故选B。12.—Who is better at speaking, Jenny or Spencer —Jenny, I think. But she does ________ in writing.A.a bit bad B.a little worse C.much better D.a bit good【解析】句意:——谁更擅长说,是珍妮还是斯宾塞?——我认为是珍妮。但是她在写作方面稍微差一点。考查副词比较级以及修饰比较级的副词。根据“Jenny, I think.But she does ... in writing”可知说话者认为珍妮较擅长说,而后面的but“但是”表示后面要说的是珍妮不足的地方,所以应填bad“差的,坏的”,问和答都是珍妮和斯宾塞作比较,所以应用比较级,a little“一点”修饰比较级。故选B。13.Credit cards (信用卡) is used ________ than before. We usually pay with smart phones now.A.little B.fewer C.less D.more【解析】句意:信用卡比以前少用了。我们现在通常用智能手机支付。考查比较级。little少,修饰不可数名词;fewer更少,修饰复数名词;less更少,little的比较级,修饰不可数名词或作副词修饰动词;more更多,many和much的比较级,修饰复数或不可数名词。根据“Credit cards (信用卡) is used … than before”可知,信用卡的使用频率比以前更少了,此处应用副词比较级less,修饰动词used,表示“较少、更少”,故选C。14.A mobile phone with 5G downloads a video ________ than the one with 4G.A.much fast B.much faster C.more fast D.more faster【解析】句意:5G手机下载视频的速度比4G手机快得多。考查副词比较级。fast副词,快地;根据 “than the one with 4G.”可知, download是动词,这里用副词修饰动词,fast的比较级是faster;much修饰比较级,much faster快地多。故选B。15.—Why are you so upset, Joe —Well, I just can't believe that I did so badly on my second practice exam, even_________ than the first one!A.badly B.worse C.worst D.the worst【解析】句意:——你为什么这么心烦,乔?——我不能相信我在第二次模拟考试中做得这么差,甚至比第一次还糟糕。考查副词比较级。badly坏地;worse更糟糕;worst最糟糕;the worst最糟糕;根据than可知用比较级;故选B。16.Lucy wants to improve her English this term, so she works _________than before.A.hard B.harder C.hardest D.the hardest【解析】句意:露西这学期想提高她的英语,所以她比以前更加努力。考查副词比较级。hard努力地;harder更努力地;hardest最努力地;the hardest最努力地。根据句中“than before”可知,此处使用hard比较级harder,表示“比以前更加努力”。故选B。17.Underground lines make people go out ________ than before.A.convenient B.convenientlyC.more conveniently D.most conveniently【解析】句意:地铁使人们出门比以前更方便了。考查副词的比较等级。convenient形容词,方便的;conveniently副词,方便地;more conveniently是conveniently的比较级,更方便的;most conveniently是conveniently的最高级,最方便地。go out是动词短语,需用副词修饰;再根据题干中的than可知用比较级,故答案选C。18.Although I read the novel last year, I decide to read it again ________________ to get a better understanding.A.less carefully B.more carefully C.the least carefully D.the most carefully【解析】句意:虽然我去年读了这本小说,但我决定再仔细读一遍,以便更好地理解。本文考查副词。less carefully更不细心,比较级;more carefully更细心,更认真,比较级;the least carefully最不认真,最高级;the most carefully最认真,最高级;根据to get a better understanding.可知是更认真,更仔细的读,故选B。19.The team played ________ on Saturday than on Tuesday.A.good B.well C.better D.best【解析】句意:这个球队周六的表现比周二好。考查副词比较级。good形容词,好的;well副词,好地;better更好的,更好地;best最好的,最好地。句中play是动词,且句中有than,所以此处使用副词well的比较级better。故选C。20.Jim jumps ________ in our class. I believe that he will win the high jump.A.high B.higher C.highest D.highly【解析】句意:Jim 在我们班跳的最高,我相信他会赢得跳高比赛。考查副词最高级。high高的;higher更高;highest最高;highly高度地。根据in our class“在我们班”,可知三者或三者以上应用最高级,此处是副词的最高级,故选C。Thanks!21世纪教育网(www.21cnjy.com)中小学教育资源网站有大量高质量资料?一线教师?一线教研员?欢迎加入21世纪教育网教师合作团队!!月薪过万不是梦!!详情请看:https://www.21cnjy.com/help/help_extract.php/ 让教学更有效 英语学科Unit 5 Amazing nature 语法讲解及专练形容词、副词比较级和最高级的构成语法精讲一、 形容词、副词比较级和最高级的构成构成方式 例词规 则 变 化 单音节和部分双音节词 一般在词尾加-er,-est small→smaller→smallest loud→louder→loudest以不发音的字母e结尾的词,加-r,-st large→larger→largest以两个辅音字母加一个元音字母结尾的重读闭音节词,双写词尾的辅音字母,再加-er,-est big→bigger→biggest early→earlier→earliest以"辅音字母+y"结尾的词,变y为i,再加-er,-est ugly→uglier→ugliest busy→busier→busiest少数以er或ow结尾的双音节词,词尾加-er,-est narrow→narrower→narrowest多音节 其他双音节词和多音节词及分词形容词,在词前加more,most important→more important→most important quickly →more quickly →most quickly不规则变化 bad/ill/badly→worse→worst;much/many→more→most;good/well→better→best; far→farther/further→farthest/furthest;old→older/elder→oldest /eldest;little→less→least【易错警示】 1. farther/farthest和further/furthest的区别:二者表示距离时,往往可互换,但是用于引申义,表示程度时,只能使用后者。 He can throw much farther/further than you. 他可以比你扔得远得多。二、 形容词、副词比较等级的句式结构和用法 1.A+be+形容词比较级than+B 表示一方超过或低于另一方的情况 在比较级+ than的结构前可以加上某些副词类和表示倍数的词,以对其进行修饰,如:far(远), even(甚至), much(许多), still(更,还), a lot(许多), a little / bit(一点), rather(相当地), slightly(略微), not any(不再), three times(三倍)等。 2.as+形容词/副词的原级+as 表示"……和……一样……" 3. 比较级+and+比较级 表示"越来越…… 4. the+比较级, the+比较级 表示"越……,就越…… 5. A+be+形容词最高级of/in…表示"A在某范围内是最……的" 6. no +比较级+ than的结构表示"A和B一样不……"。 三、 方法技巧 (一)1. 同级比较:同级比较用原形,as…as永不离;as…as加not,只言两者是同一,若是not so…as,后强前弱不看齐。 2. 比较级与最高级:两者比较than相连,三者比较the在前。 【妙语诠释】 ①同级比较一般用as…as表示"与……一样……",这时谁强谁弱无法比较出来,而not so…as则表示后者比前者强,翻译为"不如……";②比较级通常和than 连用,而最高级通常跟有定冠词the。 (二)原级用在as…as间,比较级用在than前, and连接两个比较级,说明"越来越怎样"。 三者以上最高级,副词前可不加the, even,much和a little,也常修饰比较级。 (三)一者比较用原级。比较级限二者比。三者三者往上比,最高级的用法起。 若将等级掌握齐,比较范围要搞细。比较级二句型记,做出句子没问题。 若甲乙程度相同,as…as 结构体。甲某方面不及乙,用 not so/as…as表示。语法精练单项选择1.Exercising on the playground is as ________ as studying in the classroom.A.important B.more important C.the most important2.Of all the rivers in China, the Changjiang River is ________A.long B.longer C.the longest3.— I’m getting a COVID-19 vaccine (接种新冠疫苗) this afternoon.—Everyone should take a vaccine, or we will be in even ________ danger.A.greatest B.greater C.smaller D.smallest4.— How do you find the chat show on CCTV, Lucy — Wonderful! It’s the ________ program I’ve ever watched.A.better B.best C.worse D.worst5.Jogging is ________ than many sports, just get good running shoes.A.cheaper B.cheap C.cheapest D.the cheapest6.The trip to Sydney is one that I have ever taken in the last twenty years.A.enjoyable B.more enjoyable C.the most enjoyable7.—________ clever boy your brother is!—So he is. He is ________ in my family.A.What a; clever B.What a; the cleverest C.How; cleverer8.It’s well known that the Great Wall is one of ________ man-made wonders in the world.A.great B.greater C.greatest D.the greatest9.Putting out forest fire is regarded as one of ___________ problems in the world today.A.difficult B.more difficult C.most difficult D.the most difficult10.Tony eats a lot and never takes exercise. He becomes the ________ in his class.A.thinner B.thinnest C.heavier D.heaviest11.Wendy studies ________ than any other student in her class.A.hard B.harder C.hardest D.the hardest12.—Who is better at speaking, Jenny or Spencer —Jenny, I think. But she does ________ in writing.A.a bit bad B.a little worse C.much better D.a bit good13.Credit cards (信用卡) is used ________ than before. We usually pay with smart phones now.A.little B.fewer C.less D.more14.A mobile phone with 5G downloads a video ________ than the one with 4G.A.much fast B.much faster C.more fast D.more faster15.—Why are you so upset, Joe —Well, I just can't believe that I did so badly on my second practice exam, even_________ than the first one!A.badly B.worse C.worst D.the worst16.Lucy wants to improve her English this term, so she works _________than before.A.hard B.harder C.hardest D.the hardest17.Underground lines make people go out ________ than before.A.convenient B.conveniently C.more conveniently D.most conveniently18.Although I read the novel last year, I decide to read it again ________________ to get a better understanding.A.less carefully B.more carefully C.the least carefully D.the most carefully19.The team played ________ on Saturday than on Tuesday.A.good B.well C.better D.best20.Jim jumps ________ in our class. I believe that he will win the high jump.A.high B.higher C.highest D.highly21世纪教育网(www.21cnjy.com) 展开更多...... 收起↑ 资源列表 Unit 5 Amazing nature 语法讲解及专练.docx Unit 5 Amazing nature 语法讲解及专练解析.pptx