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數(shù)由基數(shù)詞與序數(shù)詞組成,分子用基數(shù)詞,分母用序數(shù)詞。 has C. First three。 考點三: 分數(shù)【經(jīng)典習(xí)題】( ) 1. The girl spends of her free time reading every day. A. third four B. three fourth C. third fourths D. three fourths ( ) 2. There’s much meat in the basket, but of it is dirty. A. two three B. two third C. two thirds D. second three( ) 3. of the oranges been eaten by him. A. One third?!铩懊~ + 基數(shù)詞” 可用來表示編號或次序?!锂?dāng)hundred,thousand,million等詞前面有基數(shù)詞修飾時,須用單數(shù)形式。 at first 起先from first to last 自始至終 first of all 首先second to none 首屈一指,最佳的考點一: 基數(shù)詞【經(jīng)典習(xí)題】 ( ) 1. Jennifer lives in , next to me. A. six room B. Six Room C. Room Six D. the room six( ) 2. — How many boys are there in your class? — There are . A. twelve B. twelfth C. the twelfth D. the twelve ( ) 3. His grandfather likes reading very much. He has already read books. A. two hundred of B. hundreds of C. hundred of D. hundreds【考點點撥】★基數(shù)詞表示數(shù)目,可與一些名詞用連字符連接構(gòu)成復(fù)合形容詞,其中的名詞用單數(shù)形式,如a fiveday holiday。 He came out first in the petition. 他在比賽中得了第一名。5. 序數(shù)詞與名詞構(gòu)成的復(fù)合名詞前不用定冠詞。4. 序數(shù)詞前已有指示代詞、物主代詞或every時,不再用定冠詞。3. “of the + 基數(shù)詞”表示范圍。2. “a / an + 序數(shù)詞”表示“又一,再一”。 ninth 考點七 數(shù)詞和冠詞的關(guān)系1. 序數(shù)詞前要加定冠詞the;但基數(shù)詞前不加冠詞。 nine B. Nine。這 樣的形容詞只能作定語,并且里面的名詞總是用單數(shù),末尾的形容詞可以省略。 three years old 3歲 two meters tall 2米高 ten meters long 10米長 one meter deep 1米長注意: 表示某人多少歲的生日,往往用序數(shù)詞。 five 考點六 倍數(shù)、年齡、長、寬及重量等的表示法:“一倍”用once表示,“兩倍”用twice 表示,兩倍以上用“數(shù)詞 + times” 表示。 fifth C. Twelve。 1990s 2. — Hurry up! It’s __________. We’re asked to finish it by 5 o’clock. — You mean we’ve only got 20 minutes left. A. 5:20 B. 4:20 C. 4:40 D. 5:40 考點五 編號表示法1. the + 序數(shù)詞 + 名詞 the fourth page 第4頁2. 名詞 + 基數(shù)詞(名詞和基數(shù)詞的首字母都要大寫) Room Twenty 20房間3. No.+ 基數(shù)詞 + 名詞 Bus 5路公共汽車【典例精析】1. They are the students of __________. A. grade 7 B. Grade 7 C. 7th grade D. Grade 7th 2. — What should we do now, Mr. Clark? — Please turn to Page __________ and look at the __________ picture. A. Twelve。 1990s C. third fifth。 3:30 讀作half past three或three thirty 3:15讀作a quarter past three或three fifteen或fifteen past three 3:45讀作a quarter to four或three forty five或fifteen to four【典例精析】1. About __________ of the students in Grade Nine this year were born in the __________. A. three five。前半個小時用“分鐘數(shù) + past+ 已過鐘點數(shù)”;后半個小時用“(60’分鐘數(shù)) + to + 下一個鐘點數(shù)”。 3:25 讀作 three twentyfive。 in the 1980s 二十世紀(jì)八十年代注意: 表示“幾十”的數(shù)詞的復(fù)數(shù)形式還可以用來表示人的歲數(shù),其結(jié)構(gòu)為“in one’s + 數(shù) 詞的復(fù)數(shù)形式”。需要注意的是,日期讀的時候只能按照序數(shù)詞來讀。 1600讀作sixteen hundred3. 第三個數(shù)字為“零”(其他數(shù)字不是“零”)的年份,將“零”讀為O。讀的時候,將表示年份的四個數(shù)字按前后分為兩組, 每組的數(shù)字按基數(shù)詞讀。 are D. two thirds。 has B. two thirds。 are C. Two thirds。 point five point seven eight【典例精析】1. There’re many students in our school. __________ of them __________ girls. A. One third。Ⅲ. 小數(shù)的表示法及讀法 小數(shù)點前后的數(shù)字都要用基數(shù)詞表示。 Two fifths of the water in the bottle was be drunk by Tom. 湯姆喝了瓶子里2/5的水。常構(gòu)成短語“基數(shù)詞 + percent of”。 two and a half hours = two hours and a half 注意: “半杯/瓶/籃子……”通常用“half an / a …”來表示。2. 分數(shù)的幾種特殊讀法: 1/2 讀作 a half 1/4讀作 one fourth或a quarter 3/4讀作 three fourths或three quarters,整數(shù)和分數(shù)之間要用and來連接。分子大于1時,分母用復(fù)數(shù)形式。(作定語)注意:為了書寫的便利,序數(shù)詞在拼寫時常用阿拉伯?dāng)?shù)字加該詞詞尾的最后兩個字母表示。(作賓語) She was the third in the exam. 她考試得了第三名。 The first is the most important. 第一個是最重要的。注意:當(dāng)序數(shù)詞前有物主代詞、名詞所有格等限定詞時,不再用定冠詞the。,但是其前面也可以加不定冠詞a或an,表示“又一,再”的 意思,內(nèi)含順序性。 first,second,third,fourth,fifth,sixth,twentyseventh,thirtyeighth,fortyninth。(作表語) They two tried to finish the work in the shortest time. 他們兩個試圖在最短的時間內(nèi)完成工作。(作賓語) Six boys are playing basketball on the playground. 六個男孩正在操場上打籃球。 The three happily go to the museum. 那三個人高興地向博物館走去。 There are thousands of people in the hall. 大廳里有成千上萬人。,thousand,million,billion在表示確切的數(shù)字時,不能使用其復(fù)數(shù)形式;在表示 不確切的數(shù)字時,如成百上千、成千上萬,可以使用其復(fù)數(shù)形式,且要與of連用,其前 可以用a few,many,several等修飾。one hundred and one,two hundred and thirtyeight。3. 20 ~99:逢十在個位數(shù)或個位數(shù)變形后的詞尾加’ty;表示“幾十幾”時,在幾十和個 位數(shù)的基數(shù)詞之間加連字符 twenty,thirty,forty,fifty,sixty,seventy,eighty,ninety,twentyone;ninetynine。2. 13 ~19:在個位數(shù)或個位數(shù)變形后的詞尾加’teen。考點一 基數(shù)詞1. 0 ~12:各自獨立的單詞,要單獨記。中考人教版二輪復(fù)習(xí)學(xué)案專題4—數(shù)詞專題數(shù)詞精講??贾R 考點一 基數(shù)詞考點二 序數(shù)詞考點三 分數(shù)、百分數(shù)及小數(shù)考點四 事件表示法考點五 編號表示法考點六 倍數(shù)、年齡、長、寬及重量等的表示法考點七 數(shù)詞和冠詞的關(guān)系數(shù)詞分為基數(shù)詞和序數(shù)詞。基數(shù)詞表示數(shù)目;序數(shù)詞表示順序。 one,two,three,four,five,six,seven,eight,nine,ten,eleven,twelve。 thirteen,fourteen,fifteen,sixteen,seventeen,eighteen,nineteen。4. 101 ~999:整百用1 ~9的基礎(chǔ)詞加hundred表示,幾百幾十或幾百幾十幾,先說幾百, 再加and,再加末尾兩位數(shù)或個位數(shù)。5. 1000以上的數(shù):先將數(shù)字從右往左數(shù),每三位數(shù)加一個逗號隔開,從右往左依次讀作 thousand(千)、million(百萬)、billion(十