课件14张PPT。语法互动(四) 数词语法互动(四)┃数词 1.基数词的构成
(1)0—12单独记。如: zero, one, two, three等。
(2)13—19的词尾都是teen。如:fourteen, seventeen等,但13—thirteen,15—fifteen,18—eighteen需要特殊记。
(3)20以上的整十的基数词均以ty结尾。如:20—twenty,30—thirty,40—forty,50—fifty,80—eighty等。
(4)“几十几”要加连字符号“-”。如:48—forty-eight, 97—ninety-seven等。
语法互动(四)┃数词考点一 数词的构成(5)“几百几十”或者“几百几十几”在“百”后加and。如:156—one hundred and fifty-six, 509—five hundred and nine等。
(6)四位数或者四位数以上的基数词的拼写规律:用逗号从右往左每三位加一个逗号,第一个逗号读作thousand(千),第二个逗号读作million(百万),第三个逗号读作billion(十亿),hundred后莫忘“and”。如:3,610=three thousand six hundred and ten; 94,295=ninety-four thousand two hundred and ninety-five;
274,350=two hundred and seventy-four thousand three hundred and fifty等。语法互动(四)┃数词2.序数词的构成
(1)“第一”、“第二”、“第三”分别是 first, second, third。
(2)“第四”到“第十九”除了fifth, eighth, ninth, twelfth是特殊的拼写外,其余的都在相应基数词后面加“?th”构成。如:fourth。
(3)20以上的整十的序数词由相应的基数词变y为i,再加“-eth”。如:thirty→thirtieth; fifty→fiftieth。
(4)第一百hundredth; 第一千thousandth; 第一百万millionth。
(5)20以上的非整十的基数词变序数词时,只变化个位数。如:twenty-one→twenty-first; one hundred and one→one hundred and first。语法互动(四)┃数词基数词变序数词的巧记口诀:
基变序,有规律,
一、二、三特殊记, first, second, third,
从四开始加th, 八去t,九去e,
五和十二变ve为f再加-th,
整十变y为ie再加-th,
若想表示几十几,只变个位就可以。语法互动(四)┃数词语法互动(四)┃数词考点二 数词的表达方式March 12, 2014 2014年3月12日
one third 三分之一
two thirds 三分之二
five(o'clock) 5点钟
five past seven 7点5分
twenty to eight 7点40分
Page 62/the sixty-second page 第六十二页
in the 1970s 在二十世纪七十年代
in his forties 在他四十多岁时语法互动(四)┃数词1.hundred,thousand,million前有基数词修饰时,表示确数,其后不加-s,也不与of连用;但若用于表示“数百、数千、数百万”这样的泛指概念时,后面则加-s,并与of连用。
There are two hundred people in the meeting.
会上有200人。
Thousands of people go to the beach every year.
每年成千上万的人到海滨去。语法互动(四)┃数词考点三 数词的注意事项Millions of people in the world are sending and receiving e-mails every day.
每天,世界上有数百万人在收发邮件。
2.序数词的前边加不定冠词a,表示“再一、又一”。
I'll have to do it a second time.
我得再做一次。(已经做过一次)语法互动(四)┃数词Ⅰ.用括号中所给单词的适当形式填空
1.They live on the ________ (five) floor.
2.December is the ________ (twelve) month of a year.
3.On my sister's ________ (nine) birthday, I gave her a useful book.
4.________(hundred) of people come here to read books on weekends.
5.Three ________ (four) of the students in our class like basketball.
6.Our team won ________ (two) prize in the competition.语法互动(四)┃数词 fifth twelfth ninthHundreds fourthssecond7.Father's Day is on the ________ (three) Sunday of June.
8.In the ________ (eight) picture, you can see many young trees.
9.My ________ (one) name is Linda. What about yours?
10.She became very famous in her ________ (forty).
语法互动(四)┃数词 third eighth first fortiesⅡ.单项填空
1.More than eight ________ students will take part in the activity.
A.hundreds B.hundred of
C.hundred D.hundreds of
2.Now, everybody, please turn to Page ________ and look at the ________ picture.
A.Fifth; five B.Five; fifth
C.Fifth; fifth D.Five; five语法互动(四)┃数词 C B3.—How old is your daughter?
—________.We had a special party for her ________ birthday last Sunday.
A.Nine; nine B.Nine; ninth
C.Ninth; nine D.Ninth; ninth
4.Each of us has to write a ________ report every week.
A.two-hundred-word B.two-hundreds-word
C.two-hundreds-words D.two-hundred-words
5.More than ________children took part in activities last week.
A.two thirds B.thirds second
C.second three D.two third语法互动(四)┃数词 B AA