【正文】 oys 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)成復合形容詞，其中的名詞用單數(shù)形式，如a fiveday holiday。 5. 序數(shù)詞與名詞構(gòu)成的復合名詞前不用定冠詞。 3. “of the + 基數(shù)詞”表示范圍。 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。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。 five 考點六 倍數(shù)、年齡、長、寬及重量等的表示法1. 倍數(shù)的表達：“一倍”用once表示，“兩倍”用twice 表示，兩倍以上用“數(shù)詞 + times” 表示。 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。 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。 3:25 讀作 three twentyfive。需要注意的是，日期讀的時候只能按照序數(shù)詞來讀。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。 has B. 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。 Two fifths of the water in the bottle was be drunk by Tom. 湯姆喝了瓶子里2/5的水。 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。分子大于1時，分母用復數(shù)形式。（作賓語） She was the third in the exam. 她考試得了第三名。注意：當序數(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。 first，second，third，fourth，fifth，sixth，twentyseventh，thirtyeighth，fortyninth。（作賓語） Six boys are playing basketball on the playground. 六個男孩正在操場上打籃球。 There are thousands of people in the hall. 大廳里有成千上萬人。one hundred and one，two hundred and thirtyeight。2. 13 ～19：在個位數(shù)或個位數(shù)變形后的詞尾加’teen。中考人教版二輪復習學案專題4—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。 one，two，three，four，five，six，seven，eight，nine，ten，eleven，twelve。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)。 The puter only cost me two thousand yuan. 這臺電腦僅花了我2000元。（作主語） Tom has four apples. I have five. 湯姆有4個蘋果，我有5個。（作同位語）【典例精析】1. — How many teachers are there in your school? — About four __________. A. hundreds of B. hundred C. hundreds 2. The earthquake in Ya’an left __________ people homeless. A. two thousands B. thousands of C. two thousands of D. two thousand of 考點二 序數(shù)詞1. 序數(shù)詞一般由與之相對應(yīng)的基數(shù)詞加’th構(gòu)成，個別特殊形式的需要單獨記；20以上的 序數(shù)詞僅最后一個詞為序數(shù)詞形式，其他的詞還是基數(shù)詞形式。 His father has had two cars, but now he’s going to buy a third one. 他爸爸已經(jīng)有兩輛車了，現(xiàn)在準備買第三輛。（作主語） They found the second quickly. 他們很快就找到了第二個。 third = 3rdtwentyfifth = 25th【典例精析】1. Susan lives on the __________ floor and we are neighbors. A. four B. fourth C. fourteen D. forty 2. To many foreigners, Guangzhou has bee their __________ hometown. A. two B. second C. the second 3. To finish the task, we’ve tried three times, and after dinner we’ll try __________ time. A. the fourth B. a fourth C. fourth D. four 4. My mother bought me a sweater for my __________ birthday. A. twelfth B. twelve C. the twelfth 考點三 分數(shù)、百分數(shù)及小數(shù)Ⅰ. 分數(shù)的表示法與讀法1. 分子用基數(shù)詞，分母用序數(shù)詞。如果分數(shù)中含有1/2 有如下表達法： “基數(shù)詞 + and + a half + 名詞復數(shù)”或“基數(shù)詞 + 名詞（單數(shù)/復數(shù)）+ and + a half”。注意： 分數(shù)或百分數(shù)作主語時, 謂語動詞的單復數(shù)通常由分數(shù)或百分數(shù)后面的名詞而定：分數(shù)或百分數(shù)后面的名詞為不可數(shù)名詞時，謂語動詞用單數(shù)形式；分數(shù)或百分數(shù)后面的名詞為可數(shù)名詞時，謂語動詞用復數(shù)形式。小數(shù)點讀作point，小數(shù)點前的數(shù)字按照普通基數(shù)詞讀，小數(shù)點后的數(shù)字需一一讀出。 is 2. It’s said that __________ of the water around the world __________ polluted. A. two third。 is 3. For breakfast， I usuall