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2019北京初二下学期英语期中诊断准备知识点:数词!语法和词汇是初二英语学习计划的重点,也是提高英语成绩的关键,同学们要每天抽出一定的时间学背诵单词和语法的训练,下面为大家带来2019北京初二下学期英语期中诊断准备知识点:数词,希望可以帮到同学们,同学们诊断加油。
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2019北京初二下学期英语期中诊断准备知识点:数词
数词的基本用法
(一)基数词的基本用法
1.定语
Fifty thousand London dockers are out on strike.
2.主语
数词作主语,谓语动词用单数。
如: Two months is quite a long time.
Five is an odd number.
3.宾语或介词宾语
How many do you want?——Eight,please.
The city has a population of four million.
4.表语
We are altogether fourteen.
Five plus seven is twelve.
5.同位语
What work are you to assign us three?
Is there room for us two?
6.基数词+单数名词+形容词构成合成形容词。如:一个五岁的男孩a five-year-old boy;一座800米长的桥an 800-metre-long bridge;女子400米接力girls‘400-metre relay race.
7.句型:主语+is +about(大约)/ over =more than(超过)/nearly(接近)+具体数词+metre(s)/kilometre(s)/kilo(s)long / high /tall /deep /away等。如:长江长6300公里。
The Changjiang River is 6,300 kilometres long.
8.表示“……十”的数词的复数形式可以用来表示人的岁数或年代:
He is in his early thirties.
He died still in his forties.
This took place in the 1930s.
(二)序数词的基本用法
1.序数词主要用作定语,前面一般要加定冠词(或物主代词):
Tom is their second son.
They celebrated the 10th anniversary of the founding of the republic.
I will never give up,not even on the 1,000th or 10,000th try.
2.有时前面可以加一个不定冠词来表示“再一”,“又一”这样的意思:
We‘ll have to do it a second time.
Shall I ask him a third time?
When I sat down,a fourth man rose to speak.
3.First,second 等有时可用来表示“先进个人(批)”“第二个人”等:
She was among the first to come and settle in Dujiashan.
You will be the second to speak.
4.如果数字较长,序数词总避免使用,而且读的方法也常常简化:
第201房间:Room 201
第319面:page 319
先进拖拉机厂:the Number I Tractor Works
第六号车厢:Carriage No.6
南京路1490号:1490 Nanjing Road
电话号码55――2347:telephone number :55—2347
5. 在谈编了号的东西时,我们可以用基数词表示顺序:
the first part——part one
the third squad——squad three
the twenty-third section——section twenty-three
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