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1、数词数词复习复习数词数词的构成的构成基基数词数词序数词序数词112有各自独立的形式。有各自独立的形式。13-19都是相对应都是相对应39加上加上teen构成，特殊拼写的构成，特殊拼写的词有词有thirteen, fifteen, eighteen。2090都以都以-ty结尾，特殊拼写的有结尾，特殊拼写的有twenty, thirty,forty, eighty。2199,整数十位数各位数，中间有整数十位数各位数，中间有“”。百位数，由百位数百位数，由百位数and+两位数组成。两位数组成。13分别为分别为first,second,third 。419都是在后面加上都是在后面加上th,特殊的有特殊
2、的有fifth,eighth, ninth,twelfth。2090把把y变成变成ie然后加然后加th,如如twentieth。2199的序数词变后面的各位数。的序数词变后面的各位数。序数词可以用缩写，如序数词可以用缩写，如1st, 2nd, 3rd ,4th基本用法：基本用法：1.基数词：表示精确数字时，基数词：表示精确数字时，hundred,thousand,million,billion后面后面都不用变化。但是在表示几百，几千等模糊概念时，这些词后面要都不用变化。但是在表示几百，几千等模糊概念时，这些词后面要加上加上s和和of,如：如：hundreds of,而且前面可以加上而且前面可以
3、加上many,tens of等表示等表示不确切的词，注意不确切的词，注意several,some是表示确切数字的词：是表示确切数字的词：several hundred2.数词一般是用作复数的，但是特殊情况也有复数的用法：数词一般是用作复数的，但是特殊情况也有复数的用法：a.在表示一排或者一组的情况下：在表示一排或者一组的情况下：They arrived in twos and threes.b.表示几十岁：表示几十岁：the forties-41-49c.表示年代：表示年代：in the 1920s3.基数词兼有名词和形容词的功能：基数词兼有名词和形容词的功能：Nine of them are
4、 from Greece.They work forty hours a day.4.序数词主要用作定语。一般要加序数词主要用作定语。一般要加the.Our classroom is on the third floor.The first part of the story is not interesting.in the first place5.序数词也可以用作副词，序数词也可以用作副词，When did you first see him?Which horse came in first?6.基数词也能表示顺序，如书刊的卷、章、节、页的数目，住所、基数词也能表示顺序，如书刊的卷、章
5、、节、页的数目，住所、房间、教室、电话号码等等。房间、教室、电话号码等等。Volume Two, Chapter Four, Section Six, Page Eight, Room 3047.倍数的表示法倍数的表示法a. 倍数（或分数）倍数（或分数）+ as + adj. + as I have three times as many as you.我有你三倍那么多。我有你三倍那么多。b. 倍数（分数）倍数（分数）+ the size (amount，length) of The earth is 49 times the size of the moon.地球是月球的地球是月球的49倍。
6、倍。 c. 倍数（分数）倍数（分数）+ 形容词（副词）比较级形容词（副词）比较级+ than The grain output is 8 percent higher this year than that of last year. 今年比去年粮食产量增加今年比去年粮食产量增加8%。d. 还可以用还可以用by+倍数，表示增加多少倍倍数，表示增加多少倍 The production of grain has been increased by four times this year. 今年粮食产量增加了今年粮食产量增加了4倍。倍。 8.日期，时间和分数的表示法见书本日期，时间和分数的表示法见
7、书本p20。9.也可以用也可以用after和和before 表示时间，表示时间，情况分别与情况分别与 past 和和 to 相当。如：相当。如： 1It is few minutes before six oclock 现在是六点差几分。现在是六点差几分。 2The correct time is three minutes after ten 准确时间是十点三分。准确时间是十点三分。 3It happened at a quarter before five 事情发生在五点差一刻的时候。事情发生在五点差一刻的时候。10. 序数词前面一般要加序数词前面一般要加the,但是也有不加的情况，这个时
8、候表示但是也有不加的情况，这个时候表示“又一，再一又一，再一”的意思。的意思。They had a second child in 1988.上面的上面的a second 可以用可以用another 代替。代替。Exercises:1. Is there any food for us _ ?A. tenB. tenthC. the tenthD. the ten 2. The bike cost me _ yuan.Afive hundred forty Bfive hundreds fourtyCfive hundred and forty Dfive hundred fourty 3.
9、“Which lesson are you studying now?”-“_”A. The lesson six B. Sixth lessonC. Lesson six D. Lesson sixth 4. The has written a _ compositionAthree-hundred-word Bthree hundred wordsCthree hundreds words Dthree hundreds word 5. She was born on _A A1986,March 9 BMarch 9, 1986C1986,9 March DMarch nine, 198
10、6 ACCAB1. We have finished reading _ units.Athe first twoBfirst twoCthe second Dtwo first 2. My telephone number is _Aeighty eight two forty four zero nineBeight eight two double four O nineCeighty eight two four four zero nineDeight eight two four four zero and nine 3. Every day the old woman sits
11、here for _.A. one and half hourB. one and a half hourC. one and half hours D. one and a half hours 4. Mr Green Will have _ holiday very soon.A. two months B. two monthC. a two-months D. a two-month 5. Mary is_girl.A. an 8 year oldB. 8-years-oldC. the 8 years old D. an 8-year-old ABDDD1. -What day is
12、 today?- -_.-A. June 9. B. TuesdayC. It is hot. D. Its fine. 2. That magnificent _ pyramid was built by the Egyptian people.A. nine-centuries-old B. nine-centurys-oldC. nine century old D. nine-century-old3. -Whats the date today?-_-.A. Its Saturday B. Its JulyC. Its fineD. Its July 154. -What time do you get up every day?-_-.A. Its seven oclock B. Seven oclock timeC. At seven D. On sevenBDDC