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heavy - heavier happy - happier
delicious – more delicious interesting – more interesting important— more important carefully---more carefully quickly---more quickly slowly---more slowly easily--- more easily
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
Unit 3 Computers Grammar
目录
Review While-Learning
1 2
3 4
Pre-Learning Review
Part I Review
Revision and introduction
Will computers make our lives better?
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.
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.
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.
形容词和副词的最高级的用法
big expensive heavy light small
Salesman：Can I help you , sir？ David：Yes, I need a suitcase .Can you tell me about these two? Salesman： Sure. The red one costs ￥2,500, and it’s made of leather. David： I see . The red one is_m_o_r_e__e_x_p_e_n_si_v_e__ than the black one . What about the weight? Which one is _l_i_g_h_te_r____?
We form the superlative of adjectives like this :
Adjectives Superlative of adjectives
high
the highest
careful the most careful
interesting the most interesting
Part III While-Learning
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：
修饰比较级,表示程度. He runs much faster than she.
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 …”
•We often use __t_h_a_n__ after the comparative of adjectives.
Complete the conversation below and on page 40 with the comparative of the adjectives from the box.
Part II Pre-Learning
Grammar Focus
Comparatives and superlatives with adj. and adv.
short - shorter small - smaller
nice - nicer safe - safer
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
Salesman： The black one. It’s made of plastic.
Try them, sir. David： You’re right . The red one is _h_e_a_v_i_e_r__
than the black one , and it’s _s_m__a_ll_e_r__than the
形容词和副词比较级和最高级构成 (规则变化)
单音节词在词尾比较级加- er或最高级fi加ne-, ensitce, safe
以e结尾的词，只需加－r 或s－cmhsaetallp, ,whcaeaoarplmsdpy,y,, ,labzuys,yp,rdeitrttyy,
以辅音字母加 y 结尾双音节词yo变unyg,为higifh加at,–heort, red,
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
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
Adjectives
cheap tall interesting
Comparative of adjectives
cheaper taller more interesting
expensive more expensive
Work out the rule •To form the comparative of adjectives，we often add _____t-oershort adjectives and use ___m_o_r_e_with long adjectives.
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 …
black one. Salesman： Do you have a lot of things to carry? David： Yes, I do . I’ll have the black one
because it’s _b_i_g_g_e_r_ than the red one. Salesman： Thank you very much , sir.
C: large
late -- st nice
D: big
biggest
hБайду номын сангаасt
hottest
thin “双写” thinnest
wet
wettest
fat
fattest
delicious dangerous interesting popular beautiful careful friendly
A: tall short quick thick light cool warm quiet wild calm
tall the -- est
taller
tallest
B: heavy easy tidy dry busy happy healthy hungry early
