unit 1 dream homes grammar

课件18张PPT。Unit 1 Dream homes Grammar A Cardinal numbers
B Ordinal numbersWords learningzero
hundred
thousand
million
foot
square
metre
area
Over=more thannum. 零
num. 百
num. 千
num. 百万
n. 英尺
adj. 平方的
n. <英>米，公尺
<美>meter
n. 面积
prep. 超过表示数目和顺序的词叫做数词。数词又分基数词和序数词，基数词表示数量，序数词表示顺序。 表示班级、年级、学校人数等；
(Class 2, Grade 7)
2. 表示城市和国家的人口数量等；
3. 表示电话号码、车牌号、门牌
号、价格、年份等。基数词：① 21～99的两位数，十位与个位之间用连
字符“-”。例： ◇ 21 twenty-one ◇ 32 thirty-two ◇ 98 ninety-eight ◇ 99 ninety-nine
② 101～999的三位数，百位数和后面的数
之间用连词and，百后用单数形式。例: ◇ 101 one hundred and one ◇ 225 two hundred and twenty-five ◇ 999 nine hundred and ninety-nine 基数词的写法 ③ 1000以上的数，从后面向前数，每三
位中间点 “,”，第一个 “,” 读作
thousand，第二个 “,” 读作 million，
例：
◇ 2,567 two thousand five hundred and
sixty-seven ◇ 3,018 three thousand and eighteen
◇ 16,250,064 sixteen million two hundred
and fifty thousand and sixty-four hundred, thousand, million的用法：
前面有数词，表示精确数字时，则不用复数，如
two hundred, five thousand等。
表示上百、上千、上百万等不精确数字时，用复数+of
hundreds of, thousands of,
millions of来表示。疑难点基变序，真容易。一二三，特殊记，词尾字母t,d,d（first，second，third）
其余后边加th（fourth,sixth……等）
八减t，九去e，f来把ve替。（eight-eighth，nine-ninth,five-fifth,twelve-twelfth）
若是整十来结尾，只需将y变成ie（twenty-twentieth）
若是遇到几十几，只变各位就可以（twenty-one---twenty-first）序数词的构成 ① 一般来说，是由相应的基数词加词尾th
构成。例： ◇ four ＋ th → fourth ◇ six ＋ th → sixth ◇ seven ＋ th → seventh
◇ ten ＋ th → tenth
② 下面这些基数词在变为序数词时，有特
殊的变化。例： ◇ one → first ◇ two → second ◇ three → third ◇ five → fifth ◇ eight → eighth
◇ nine → ninth ◇ twelve → twelfth 序数词的构成 ③ 十位整数序数词的构成方法是将基数词
的词尾y变成ie，然后再加th。例： ◇ twenty → twentieth ◇ thirty → thirtieth ◇ forty → fortieth ◇ ninety → ninetieth
④ 两位或两位以上的基数词变成序数词
时，仅将个位数变成序数词。例： ◇ twenty-one → twenty-first ◇ thirty-five → thirty-fifth ◇ a hundred and fifty-three →
a hundred and fifty-third Time for reflection基数词表达数量、编号、号码：
e.g. The CN Tower is 1,815 feet tall.
There are about 8,000,000 people
living in London.
序数词表达顺序、日期、楼层
e.g. Women’s Day is on the eighth of March.
Our flat is on the seventh floor.
He is always the first to come to school
in our class.序数词单独使用时前边需要加定冠词the
eg. 我们的教室在三楼。
Our classroom is on the second floor.
当序数词前有了其他限定词的时候，则不需要加冠词the
eg. 我的父亲将要过四十岁生日。
My father will have his fortieth birthday.考考你用英语写出括号中所给数字的正确形式：
1.There are _________(42)students in Class
___________(18)this term.
2.Our new English teacher’s telephone number is _____________________________
__________________________(13954682378)
3.__________________________(621)people took part in the __________(30)London Olympic games.And _______________
________________(396)of them were players.forty-twoEighteen one three nine five four six eight
two three seven eightSix hundred and twenty-onethirtieth three hundred and
ninety-six5.The New Golden Eagle Building is about
_____________(200) metres tall.
6.You can buy new clothes on the ________(9)
floor in the shopping centre.
7.There are _________(7) days in a week, and Saturday is the __________(7) day.
8.His grandfather is _______________(99)
years old. His birthday is on ______________
________________(21) of January.two hundredninthsevenseventhninety-nine the
twenty-first
9.Zhang Yining got the ______________(100)
Summer Olympics gold medal for China in
_________________________(2，004).
10.China has an area of around ___________
___________________________(9,600,000) square kilometres.one hundredthtwo thousand and four nine
million six hundred thousand注意：表达多大岁数时用基数词：I’m twelve (years old).
表达几岁生日时用序数词：It’s his twelfth birthday.homework1.复习数词的拼写和使用方法。
2.做课课练上的习题。
3.预习下一课时。