Unit 3 Computers Grammar.

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1 Unit 3 Computers Grammar

2 Grammar Focus 找规律 Comparatives and superlatives with adj. and adv. big
- bigger thin - thinner short - shorter small - smaller heavy - heavier nice - nicer happy - happier safe - safer

3 找规律 delicious – more delicious interesting – more interesting
important— more important carefully---more carefully quickly---more quickly slowly---more slowly easily--- more easily

4 形容词和副词的比较级 大多数形容词和副词有三个等级： 原级、比较级、最高级。 一、形容词比较级的构成 构成的规则变化:
1)在形容词后直接加-er。 如：short -- shorter small -- smaller 2)以不发音的e结尾，直接加 r. 如: nice -- nicer safe -- safer

5 3) 重读闭音节词末尾且只有一个辅音字母时, 先双写
这个辅音字母, 再加-er。 如: big – bigger thin – thinner 4) 以“辅音字母+ y”结尾的双音节词，先改y为i, 再 加-er。 如：easy – easier happy – happier 5) 多音节词和部分双音节词在词前加more。 如：delicious – more delicious interesting – more interesting important—more important easily--- more easily carefully---more carefully slowly---more slowly quickly---more quickly

6 找规律 tallest A: tall taller short quick tall thick light cool warm
quiet wild calm taller tall the -- est

7 B: heavy easy tidy dry busy happy healthy hungry early
y -- i-- est

8 C: large late nice D: big biggest hot hottest thin “双写” thinnest wet
wettest fat fattest

9 delicious dangerous interesting popular beautiful careful friendly the most -- adj .

10 二、形容词最高级的构成 构成的规则变化: a. 直接加-est. 如：short--shortest small--smallest b. 以-e 结尾的形容词，最高级+ st。 如：large—largest nice—nicest cute—cutest c. 以辅音字母+y结尾的形容词，变y为i + est。 busy—busiest heavy—heaviest easy—easiest happy—happiest dirty—dirtiest

11 d. 以重读闭音节结尾，末尾只有一个辅音字母
的词，双写最后一个辅音字母，再+er或 +est。 如： big—bigger—biggest thin—thinner—thinnest fat—fatter—fattest hot—hotter—hottest e. 多音节和部分双音节形容词，需在原级前+more 构成比较级，+ most 构成最高级。如： important—more important—most important beautiful—more beautiful– most beautiful difficult—more difficult—most difficult

12 不规则变化： 原级 比较级 最高级 good /well better best bad /ill worse worst little
less least many /much more most far farther /further farthest /furthest old older /elder oldest /eldest

13 cheap, cold, small, warm, young, high fine, nice, safe
形容词和副词比较级和最高级构成 (规则变化) tall taller- tallest 单音节词在词尾比较级加- er或最高级加- est cheap, cold, small, warm, young, high fine, nice, safe happy, busy, dirty, easy, lazy, pretty late later - latest 以e结尾的词，只需加－r 或－st fat, hot, red, thin, wet, sad early earlier – earliest 以辅音字母加 y 结尾双音节词变 y 为 i 加 –er 或 –est 重读闭音节、末尾只有一个 辅音字母双写加 –er 或 –est big bigger- biggest narrow, yellow quickly, slowly, useful, careful, popular, modern, clever cleverer-cleverest 少数以er,ow 结尾的双音节词加-er -est 部分双音节和多音节词在原级前加 more 或 most fluently/difficult more～, most～

14 形容词和副词比较级的用法 1.Who runs faster, he or she? 2.He runs faster than she.
3.He runs much faster than she. 4.He becomes healthier and healthier. 5.The more you exercise, the healthier you will be. 6.She is less healthy than he.

15 1. 表示两者之间的选择, 可用“Which/Who … + 比较，…or…?”. Who runs faster, he or she? 2. 表示两者之间的比较，通常用连词 than 引导， 表示“更······一些”． He runs faster than she. 3. much/far/a lot, even, still, a little/a bit … 修饰比较级,表示程度. He runs much faster than she.

16 4. “比较级+and+比较级”表示“越来越……”
He becomes healthier and healthier. Shanghai is becoming more and more modern. 5. “the+比较级 , the + 比较级”表示“ 越…, 越 …” The more you exercise, the healthier you will be. 6. 表示不及另一方时，用“less+原级+than…” 　 (双音节和多音节词) He is healthier than she. She is less healthy than he.

17 形容词和副词的最高级的用法 1.表示三者或三者以上比较,可用”Which/Who … +最高级,…,…or …?”表示.
Who is the tallest, Tom , Mike , or Jack? 2. 最高级+of/among (同类比较) in… (范围比较) Tom is the tallest of the three. Tom runs (the) fastest in our class. 3. 序数词修饰最高级 Mike is the second tallest student in our class. 4.one of + 形容词最高级 +名词复数表示“最… 之一” Jack is one of the tallest students in our class.

18 A The comparative of adjectives
When we compare two people or things，we can use the comparative of adjectives .We form the comparative of adjectives like this： Adjectives Comparative of adjectives cheap cheaper tall taller interesting more interesting expensive more expensive

19 We often use _______ after the comparative of adjectives. -er more
Work out the rule To form the comparative of adjectives，we often add _________to short adjectives and use ___________with long adjectives. We often use _______ after the comparative of adjectives. -er more than

20 Complete the conversation below and on page 40 with the comparative of the adjectives from the box.
big expensive heavy light small 600 Can I help you , sir？ Yes, I need a suitcase . Can you tell me about these two? Sure. The red one costs ￥2,500, and it’s made of leather. I see . The red one is___________________ than the black one . What about the weight? Which one is __________? Salesman： David： Salesman: David: more expensive lighter 2500

21 Salesman: The black one. It’s made of plastic. Try them, sir. You’re right . The red one is _________than the black one , and it’s _________than the black one. Do you have a lot of things to carry? Yes, I do . I’ll have the black one because it’s _______ than the red one. Thank you very much , sir. David: heavier smaller Salesman: David: bigger Salesman:

22 B The superlative of adjectives
When we compare more than two people or things, we use the superlative of adjectives. The red laptop is the smallest among the three.

23 We form the superlative of adjectives like this : Adjectives
high the highest careful the most careful interesting the most interesting Work out the rule To form the superlative of adjectives, we often add _______ to short adjectives and use _________ with long adjectives. We usually use ________ in front of the superlative of adjectives. -est most the

24 B1 David is shopping for a camera
B1 David is shopping for a camera. Look at the photos and write the letter of the correct model after each statement. a Made in 2010 350 g 109mm x 78mm x 46mm ￥3,589 Made in 2012 170 g 99.8mm x 56.4mm x 24.5mm b ￥2,530 Made in 2011 183 g 103mm x 57mm x 27.3mm c ￥1,700

25 David: I’d like to see some of your cameras. Salesman:
Certainly. This is the most expensive model. This is the cheapest model. This is the newest and lightest model. a (1) ________ c (2)______ b (3)______

26 B2 David told his friend Tony about his shopping trip
B2 David told his friend Tony about his shopping trip. Complete David’s sentences with the superlative of the adjectives from the box. expensive light old small Tony: Did they show you any cameras? Yes. The (1) __________ model is (2) __________________________. The (3)________________________model costs (4)__________. The (5)___________ model was made in (6)__________. The (7)___________ model weighs (8)_______. David: smallest 99.8mm x 56.4mm x 24.5mm most expensive ￥3,589 oldest 2010 lightest 170g

27 Exercises 一、完成句子。 1. Hainan is a very large Island .It is the
second _________ island in china. (large) 2. Our teacher is as ______ as before. (busy). 3. He is ______________ among us. (careful) 4. Li Lei jumped far ______ than Jim. (far) 5. The busier he is, the ________ he feels. (happy) 6. I think Yao Ming is one of ____________ basketball players in NBA. (hot) largest busy the most careful farther happier the hottest

28 二、用括号中形容词的适当形式填空。 1. I am very _______. But Tom is ____________ than I . Frank is _________________. （tired） 2. Which is _____________ （difficult）, physics or biology ? 3. This book is ________ than the other two . It is ____________of the three . （easy） 4. In summer it’s _______ （hot） in Wu Han than in Beijing . 5. The Chinese people have a much _______ （good）life now . tired more tired the most tired more different easier the easiest hotter better

29 三、填空。 1. Lily gets up __________ (early) than Lucy. 2. Which goes ______________ (slowly), Tom or Jim? 3. This book is (interesting) than one. earlier more slowly more interesting 4. She works ____________________(careful) in her school. 5. Who goes to bed ____________ (late) Jim, Tom or Jack? I think turkey is ________________ (delicious) of all. the most carefully the latest the most delicious

30 四、改写句子。 1. We are going to the Green Restaurant for lunch. (就划线部分提问)
____________ you going for lunch? 2. Sam is the shortest in his class. (改为同义句) Sam is ________ than ____ _____ student in his class. Sam is _______ than _____ _____ students in his class. Sam is _______ than________ ______ in his class. 3. How do you like Screen City? (改为同义句) _______ do you __________ Screen City? Where are shorter any other shorter the other shorter anyone else What think of

31 Homework 1. 熟记形容词的比较级和最高级的构成方式。
1. 熟记形容词的比较级和最高级的构成方式。 2. 以下各组事物中，你最喜欢或讨厌哪一个？请运用所给的含形容词的比较级和最高级的句型陈述理由。 dog, cat, bird summer, winter, spring swimming, dancing, running I like / dislike...because it is ...than...； I like / dislike...because it is the... 3. 完成《练习册》第35至37页Grammar的练习。