内容正文:
高中必修第一册重庆大学版
【语法专版】
Unit 6 Surprising Plants
语法专版
【专题】情态动词与植物主题语法
Unit 6 Surprising Plants
考频分析
重庆大学版必修第一册中,Unit6 Surprising Plants相关语法是重点语法模块,考频占语法总量的
15%左右,贯穿试卷核心题型:单项选择(1-2题)、完形填空(2-3题)、语法填空(1-2题)、阅读
理解(涉及植物相关词汇及句式理解)。在语境理解类题目中,该单元的词汇辨析及相关句式结构
往往是解题关键。
情态动词(can/may/must表能力、许可、推测)是高中英语语法的重要模块,考频占语法总量的8%
左右,主要分布在试卷核心题型:单项选择1-2题、完形填空1-2题、语法填空1题、书面表达(核
心考察,直接影响语气表达与语境适配性)。在语境理解类题目中,情态动词的语气辨析、推测用
法及情景适用性往往是解题关键。
考查内容
·情态动词:can/may/must表能力、许可、推测的核心用法
。植物主题词汇:植物特征、生长过程、分类及环境关系相关词汇
。被动语态应用:植物主题语境下的主动被动转换
知识点一:情态动词核心用法
1.情态动词三大维度
1.基础含义辨析:
。can表能力与许可
·may表许可与推测
。must表必须与肯定推测
2.语境应用匹配:
。请求许可用may/can
·肯定推测用must
高中必修第一册重庆大学版
【语法专版】
Unit 6 Surprising Plants
。能力表达用can
3.句式转换与否定:
·肯定句、否定句、疑问句的结构变化
·can't表否定推测
。nustn't表禁止
知识点二:植物主题核心词汇
1.植物特征类
l.核心词汇:root(根)、sten(茎)、leaf(叶子,复数leaves)flower(花)、fuit(果实)、seed(种
子)、petal(花瓣)入、runk(树干)、branch(树枝)
2.例句
The root of the plant absorbs water from the soil.
Most plants have green leaves to make food.
2.植物生长类
1.核心词汇与短语:grow(生长)、bloom(开花)、seedling(幼苗)、sprout(发芽)、photosynthesis
(光合作用)、take in(吸收)、give out(释放)
2.例句:
The seeds will sprout in a few days if we water them.
Plants take in carbon dioxide and give out oxygen.
3.植物分类类
1.核心词汇:tree(树)、grass(草)、flowering plant(开花植物)、non-flowering plant(不开花植物)、
cactus(仙人掌)、moss(苔藓)
2.主被动转换:
●The seeds will sprout in a few days.(主动语态)
·The seeds were sprouting when I checked this morning.(被动语态)
4.植物与环境的关系
l.主a动语态:lumans should protect the environment for plants.
2.被动语态:The environment should be protected for plants.
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高中必修第一册重庆大学版
【语法专版】
Unit 6 Surprising Plants
5.植物对环境的影响
l.主动语态:Plants help to reduce air pollution.
2.被动语态:Air pollution is reduced by plants.
6.植物与人类生活的关系
1.主动语态:Many plants are used in traditional medicine.
2.被动语态:Many plants are used in traditional medicine.
知识点三:情态动词详解
1.基础含义与分类
1.能力:can(能/会)、could(过去能)
例句:She can speak three languages./I could swim when I was five.
2.许可:may(可以)、can(非正式)
例句:May I borrow your pen?/You can go home now.
3.义务/必要:must(必须)、have to(不得不)
例句:We must follow the rules../He has to work late today.
4.推测:may(可能)、must(一定)、can't(不可能)
It may rain tomorrow./She must be at home./He can't be in the library now.
2.否定形式与疑问结构
否定形式:直接在情态动词后加not(can→can't:may→nay not;must→nustn't)
例句:You can't park here../We mustr't talk in class.
疑问结构:将情态动词提至句首
例句:Can you help me'?/Must I finish it today?
3.特殊用法
1.must提问的否定回答用needn't(不必)
例句:一Must I hand in the homework now?-No,you needn't.
2.can/could表示请求时,could更委婉
例句:Could you please open the door?
3.may/might表示推测时,might可能性更低
例句:She might come to the party tonight,
高中必修第一册重庆大学版
【语法专版】
Unit 6 Surprising Plants
4.had better(最好)+动词原形
例句:You had better go to bed early.
5.need作情态动词时,仅用于否定/疑问句
例句:Need we leave now?/You needn't worry.
考法精析
考法一:情态动词用法辨析
核心:根据语境正式程度,区分can(口语随意)与may(正式礼貌)表许可时的用法
真题1(单项选择):
-I borrow your notes for the history class?I left mine at home.
A.Can B.Must C.Should D.May
答案:D
解析:向他人请求许可且语境偏向礼貌正式(借笔记),用may:can虽可表许可但更口语化,此处
优选D。
真题2(语法填空):
Students-not use mobile phones during exams.(提示:表禁止,正式场合)
答案:may
解析:由“正式场合”和“禁止”提示,may not表委婉禁止,符合考试场景的礼貌规范;mustn't
语气过于强硬,此处不适用。
考法二:情态动词与被动语态结合
核心:结合植物相关语境,综合运用情态动词(can/may/must/.should)的否定、疑问形式及被动语
态基本结构(情态动词+be+过去分词)
真题1(单项选择):
These rare plants_in special greenhouses because they are sensitive to temperature changes.
A.must grow B.must be grown C.can grow D.may grow
答案:B
解析:主语“these rare plants”是动作“grow”的承受者,需用被动语态;根据语境“因为它们对
温度变化敏感”,应用“must”表必须,情态动词的被动语态结构为“must+be+过去分词”,grow
的过去分词为grown。
真题2(语法填空):
Flower seeds_(should not plant)in cold weather.It's better to wait until spring.
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高中必修第一册重庆大学版
【语法专版】
Unit 6 Surprising Plants
答案:should not be planted
解析:主语“flower seeds”是动作“plant'”的承受者,用被动语态;“should not'”表不应该,情态
动词的被动语态结构为“should not+be+过去分词”,plant的过去分词为planted。
解题小妙招
情态动词解题妙招
许可语气看场合,口语随意用cam,正式礼貌选may:
否定推测can't上,禁止必须mustn't:
义务责任用must,否定禁止mustn't:
不必用needn't,委婉建议should好:
综合运用看语境,能力许可推测义务要分清:
疑问开头may更礼,can在口语也常用:
肯定推测must准,可能推测may/might行;
被动结构be done跟,情态之后加原形。
真题演练
演练一:单项选择
1.-I borrow your history notes?I need to check some key points.
-Sorry,you_ask Lily instead.I left mine at home.Shehave them because she always brings her notes
to class
A.May,mustn't;must
B.Can;needn't;may
C.May;can't;must
D.Can;shouldn't;may
答案:C
2.You_(not park)here!The sign says"No Parking".If you do,you_(get)a fine.And passengers
(wear)seat belts when driving,it's the law.
答案:mustn't,may,must
答案区
演练-:1.C
演练二:1.mustn't,may,must
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