1、4以“辅音字母y”结尾的双音节词, ,比较级加 ;easy easier heavy heavier5多数多音节词,比较级在前面加 ;beautiful more beautiful different more different 6有少数形容词的比较级是不规则的,必须熟记。good/well _ bad _ old many/much little far 专项练习:一、写出下列形容词的比较级old_ young_ tall_ long_short_ strong_ big_ small_fat_ thin_ heavy_ light_nice_ good_ beautiful_low_
2、high_ slow_ fast_二、翻译句子:1、谁比Jim年纪大?是你。_ is _than Jim? _ are2、谁比David更强壮?是Gao Shan._ _ than David? Gao Shan _.3、谁的铅笔更长,他的还是她的?我想是她的。_ pencil is _,_or_?_is,I think.4、谁的苹果更重,你的姐姐的还是你的弟弟的? 我的弟弟的。_ apples _ _,your _ or your _?My _ _.5、你和你的叔叔一样高吗?是的。_ _as _as your uncle?Yes,I am.6、他和他的朋友Jim一样年轻。He _ as _
3、as _ _ Jim.7、她和她的双胞胎哥哥一样胖吗?不,她比他瘦。_ _ as _ as_ twin _?No, _ _ than him.8.Yang Ling每天睡得比SuYang晚。Yang Ling _ to _ _ than Su Yang every day.9.我跳得和Mike一样远。I _ as _ as Mike.10.Tom比你跑得快吗?不是的,他和我跑得一样快。_ Tom _ _ than you?No,he _. He_ as_ as_.11.多做运动,你会更强壮。_ more exercise,youll _ _ soon.12.我的科学很好,但是语文不好。I _
4、_ at Science.But I dont _ well in Chinese.13. 你放风筝比王兵放得高吗?不,我比他放得低。_you_the kite_than Wang bing?No,I_it _than_.14.我喜欢游泳。我所有的朋友都游得比我慢。I like_.All my_ _ _than me.v形容词的最高级定义:形容词、副词的最高级形式主要用来表示三者或三者以上人或事物的比较,表示“最”的意思。结构:三者或三者以上物体比较用最高级, 最高级通常在词尾加est.句子中有表示范围的词或短语。of the three, in our class等等。 He is the
5、tallest in our class. 他在我们班里是最高的。形容词最高级前一定要有定冠词the,而副词最高级前则不需要。形容词最高级构成规律:1一般情况下,最高级在后面加 ;small smallest short shortest辅音元音辅音)中,先双写末尾的辅音字母,最高级加-est;big biggest hot hottest3以不发音e结尾的单音节词,最高级在原级后加 ;large largest nice nicest 4以“辅音字母y”结尾的双音节词, ,最高级加 ;easy easiest heavy heaviest5多数多音节词,最高级在前面加 ;beautiful
6、most beautiful different most different 6有少数形容词、副词的比较级和最高级是不规则的,必须熟记。good bad old many/much little far 注意: 形容词最高级前一定要有the, 而副词最高级则不需要。总结规则变化构成法原级比较级最高级单音节词+er/estshortshortershortestcoldcoldercoldest以不发音e结尾的词+r/stwidewiderwidestlargelargerlargest单个辅音字母结尾的重读闭音节词,双写末尾辅音字母+er/estbigbiggerbiggesthothott
7、erhottest以辅音字母+y结尾的词,变y为i+er/estheavyheavierheaviestbusybusierbusiest多音节词在前面+more/mostimportantmore importantmost importantbeautifulmore beautifulmost beautiful不规则变化口诀两多many/muchmoremost一老oldelder(家庭中表长幼)eldest两好good/wellbetterbestolder(岁数大,东西旧)oldest两坏病bad/badly/illworseworst远距离farfarther(距离远)farth
8、est一少littlelessleastfurther(程度深,深入)furthest一、写出下列形容词的最高级。3.tall16.dark32.beautiful4.young19.big34.expensive6.strong20.thin35.important9.high21.hot36.different10.slow23.large39.bad/ill12.high24.heavy40.far14.cheap26.easy41.old15.bright29.pretty30.funny二、单项选择1. The whale is the ( ) animal. A. heavy B.
9、 heavier C. heaviest D. ligthest2. ( ) hair is the longest? A. Who B. Whose C. Whom D. What 3. The giraffe is the ( ) animal. A. tallest B. smaller C. tall D. smallest4. Ruby is the ( ) dancer. A. best B. good C. better D. bestest5. Josh is the ( )at singing. A. bad B. good C. worst D. better课后作业一、根
10、据句意填入单词的正确形式。1My brother is two years _ (old) than me.2. Is your sister _ (young) than you? Yes, she is.3. Who is _ (thin),you or Helen? Helen is.4. Whose pencil-box is _ (big), yours or hers? Hers is.5Ben jumps _ (high) than some of the boys in his class. 6Does Nancy sing _ (well) than Helen? Yes,
11、she does. 7My eyes are _(big) than hers. 8Which is _ (heavy), the elephant or the pig?9Who gets up _ (early), Tim or Tom?10Do the girls get up_(early) than the boys? No, they_.11Jim runs _ (slow). But Ben runs _ (slow).二、选择。( )1. The yellow shoes are than the blue ones.A.expensiveB. expensiverC. mor
12、e expensive( )2. A cow is bigger than a mouse.A.much B.moreC.many( )3. Whos the ,Jean,Joan or Jennet?A.thinnerB.thinestC.thinnest( )4. Tim is than Jack.A.funnyB.much funnyC.funnier( )5. Im taller than others in my class.Im .A.tallB.tallestC.the tallest( )6. Who can sing better Rose?A.thanB.thenC./ (
13、 )7. I have books than you have.A.manyB.muchC.more( )8. His uncles house is very .A.old B.olderC.oldest( )9. My bike is ,but his bike is .A.new,newB.new,newerC.new,newest( )10. Please clean your room.Its now.A.cleanB.dirtyC.tidy四、翻译句子。1谁比Jim年纪大?_ is _than Jim?_ are2谁比David更强壮?_ than David?Gao Shan_.
14、3谁的铅笔更长,他的还是她的?_ pencil is _ ,_ or _?_is, I think.4Yang Ling每天睡得比Su Yang晚。Yang Ling _ to _ _ than Su Yang every day. 5你放风筝比王兵放得高吗?_ you_the kite _than Wang Bing?No,I _ it _than _ .6我的姐姐起得比我早。My _ up _than me.7她不擅长体育。但我跳得没有她高。She doesnt _in PE. But I dont_than _.五、用所给词的正确形式填空。1. Maria is _(thin). Luc
15、y is _(thin) than Mary.2. Mike is _(heavy) boy in his class.3. Tom is as_ ( tall) as Jim.4. I am much _( well) than yesterday.5. This skirt is _( expensive) of the three.6. The weather today is _(hot) than it was yesterday.7). Lucy writes _(careful) than her brother.8)Today is _(busy) day this week.
16、9)That is _ (easy ) of all.10). He is _ (clever ) boy in the class.11). John is _ ( short ) than Tom.12). This box is _ ( heavy ) than that one. 加减法的速算与巧算奥数知识在进行加减运算时,为了又快又好,除了要熟练地掌握计算法则外,还需要掌握一些巧算的方法。加减法的巧算主要是运用“凑整”的方法,把接近整十、整百、整千的数看作所接近的数进行简算。进行加减巧算时,凑整之后,对于原数与整十、整百、整千相差的数,要根据“多加要减去,少加要再加,多减要加上,少减要再减”的原则进行处理。另外,可以结合加法交换律、结合律以及减法的性质进行凑整,从而达到简算的目的。【例题1】 计算下面各题。(1)39655 (2)4271008
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