Unit 3 Section2 Grammar2 课件2024-2025学年沪教版七年级英语上册

Unit 3 The seasons Section 2 Exploring and applying rules 形容词 ①原级：与...（不）一样 ②比较级：两者之间做比较 ③ 最高级：三者或三者以上做比较 1.形容词的原级常用于“as…as”及“not as(so) …as”两种句型中。 （1）句型“as…as”，表示两者相比较，程度相同 如：The old man walks as fast as a young man. 这位老人走路与青年人一样快。 This coat is as expensive as that one. 这件上衣与那件一样贵。 ①原级 （2）句型“not as(so) …as”，表示两者相比较，程度不一样 如：I’m not as tall as Jack. 我不如杰克高。 She doesn’t run so fast as I. 她不如我跑得块。 随堂练习：用所给词的适当形式填空 1.Lily is as______________(cold) as her twin brother. 2.Helen’s English isn’t as _________ (well) as mine. 3.This dictionary is not as ___________ (use)as you. 4.It's raining as ___________(heavy) today as yesterday. 5.He speaks English as ______(good) as a native speaker. cold good useful heavily well ②比较级(两者之间作比较) 1.规则变化: (a)直接加er ：shorter, slower (b)以不发音的e 结尾的，直接在后面加r: nice-nicer (c)以一个元音加一个辅音结尾,要双写最后一个辅音字母, 后加er：bigger,thinner (d) 以辅音字母+y结尾的,先把y改为i再加上er: heavy-heavier (e)多音节词前加more: more interesting more important ②比较级(两者之间作比较) 2.不规则变化: good-better-best well-better-best bad-worse-worst badly-worse-worst many-more-most much-more-most little-less-lest 【即学即练】 写出下列形容词与副词的比较级 long_____________ much_______________ wide __________ heavy____________ fat _________________ good__________ far_____________ slow ______________ little___________ difficult _______________________ longer heavier more fatter wider better slower farther more difficult less 3. 形容词比较级的用法 （1）than 两者（人/物）进行比较时用比较级， 表示“一个比另一个更…”或“较…”。 句式为：A+ 谓语动词+比较级+than+B。 注： 如果上下文明确，比较级也可单独使用。 如：He is taller than me.他比我高。 3. 形容词比较级的用法 （2）or 句式：特殊疑问句，A or B？ 如：Who is younger, Lucy or Lily? 露西和莉莉，谁更小一些？ （3）修饰比较级的词：much, far, even, still, a lot, a little, a bit 如：I'm a little taller than him. 我比他高一点。 3. 形容词比较级的用法 （4）两个形容词的比较级可以叠加表示“越来越”的意思。 其结构可以是：比较级＋and＋比较级， more and more＋比较级结构。 单音节词： better and better 越来越好 多音节词： more and more beautiful 越来越漂亮 3. 形容词比较级的用法 （5）the +比较级，the+ 比较级 表示“越…，越…” 如：The more, the better.越多越好。 随堂练习：完成句子 1.That must be a lot ____________________(interesting) than taking a bus. 2.It’s much _____________(cold) today than it was yesterday. 3.Chinese will become ____________________ important in the world. 4.I hope your English would become_____________________.(越来越好） more interesting colder more and more better and better 随堂练习：完成句子 5.____________________you eat , ________________you’ll become. 你吃的越多,你就会变的越胖。 6.____________you study, ____________________ you’ll become. 你学习越努力，你就会变的越聪明。 The more the fatter The harder the more clever ③最高级(三者或三者以上做比较) 1.规则变化: (a)直接加est ：shortest, slowest (b) 以不发音的e 结尾的，直接在后面加st: nice-nicest (c)以一个元音加一个辅音结尾的,要双写最后一个辅音 字母,后加est：biggest, thinnest (d) 以辅音字母+y结尾的,先把y改为i再加上est: heavy-heaviest (e)多音节词前加most: most interesting most important 【即学即练】 写出下列形容词与副词的最高级 long_____________ much_______________ wide __________ heavy____________ fat _________________ good__________ far_____________ slow ______________ little___________ difficult _______________________ longest heaviest most fattest widest best slowest farthest most difficult lest 2.用法 ①of /in 三者或三者以上的人或物进行比较时，用最高级， 形容词的最高级前面要加the，后面用of/in. of + 同类人/物 in+ 表地点的范围. 如：Tom is the tallest (boy) in his class. 汤姆是他班上最高的男生。 Tom is the tallest (boy) of all the boys (in his class). 2.用法 ②or which/who 引导的选择疑问句有三者相比，也可用最高级。 ③one of +the + 形容词的最高级+名词复数，表示“……中最……之一” 如：Xi'an is one of the oldest cities in China. 西安是中国最古老的城市之一。 2.用法 ④the + 序数词+ 形容词的最高级+名词，表示“第几……的” 如：Helen is the second youngest child in his family. ⑤当形容词的最高级前有形容词性物主代词、名词所有格时， 不用定冠词the. 如：This is my best book of all.这是我所有书中最好的一本。 随堂练习：用所给词的适当形式填空 1.Which is _________________(big),the sun, the earth or the moon? 2.Who is_________________(tall), Tom, Mike or John? 3.The Yellow River is the second ______________(long) river in China. 4.Ma Yun is one of ______________ (rich) persons in the world. the biggest the tallest longest the richest 单项选择 1.She felt much_____ and went back to school.  A. good  B. better  C.bad  D. worse 2. My time in the middle school was one of _____ periods of my life. A. exciting   B. more exciting  C. the more exciting D. the most exciting 3.Alice works as ______ as she plays． A.happy B.happily C. happier D. happiest Thank you $$