(共13张PPT)
第二部分 语法专题剖析
专题五 数词
2023年安徽中考英语总复习二轮专题课件
(近10年未考)
考点透析
常见基数词与序数词对照表
one→first two→second three→third
four→fourth five→fifth six→sixth
seven→seventh eight→eighth nine→ninth
ten→tenth eleven→eleventh twelve→twelfth
thirteen→thirteenth fourteen→fourteenth fifteen→fifteenth
sixteen→sixteenth seventeen→seventeenth eighteen→eighteenth
nineteen→nineteenth twenty→twentieth thirty→thirtieth
forty→fortieth fifty→fiftieth sixty→sixtieth
seventy→seventieth eighty→eightieth ninety→ninetieth
续表
基变序,有规律,末尾加上-th;
一二三,特殊记,词尾分别t,d,d;
八去t,九去e,ve要用f替;
以y结尾变-ie,后跟-th莫忘记;
若想表示几十几,只变个位就可以。
考向1 基数词
(1)表示数量:表示人或事物的确切数量,用基数词+可数名词单数/复数。如:one apple一个苹果;two pears两个梨。
(2)表示时刻:
①表示“……点”用“基数词+o’clock”,如:nine o’clock 九点钟;
②表示“……点过……分”时,若分钟数小于或等于30分钟,用“基数词+past+基数词”,如:twenty past three 三点二十分;
③表示“差……分到……点”时,若分钟数小于30分钟, 用“基数词+to+基数词”, 如:twenty to three两点四十分(三点差二十分)。
(3)表示日期:
①年份用基数词,如:in 2023 在2023年;
②日期用序数词,如:on Sept.12th 在9月12日。
(4)表示年代和年龄:
①“in the+整十的年份的复数(年份的数字后加-s)”表示“在几世纪几十年代”。如:in the 1870s 在19世纪70年代
②表示年龄的句式。如:
He is a boy of 10 years old. =He is a 10-year-old boy. 他是一个10岁的男孩子。
③“at the age of+基数词”表示“在……岁时”。如:
At the age of ten, he was good at playing the piano. 他10岁时就擅长弹钢琴了。
④“in+one’s+整十的基数词复数”表示“在某人几十多岁时”。如:
When he was in his fifties, the man became a famous writer.这位男士在他50多岁时成为一名著名作家。
考向2 序数词
(1)序数词前加the, 其后接名词单数。如:
Father’s Day is on the third Sunday of June and it’s popular in the USA. 父亲节在六月的第三个星期天,该节日在美国很流行。
(2)序数词前若有形容词性物主代词、名词所有格等限定词时,则不用加the。如:
It is my third time to visit Beijing. 这是我第三次参观北京。
(3)序数词前面也可以加不定冠词a或an, 表示“又一,再”, 内含顺序性。如:
We’ve tried it three times. Must we try it a fourth time? 我们已经试过三遍了。还需再试一次(第四次)吗?
考向三 概数词
(1)表示确切的数字:具体数字+概数词+可数名词复数。hundred, thousand, million, billion等词与具体的数字one, two…或several, some, many等词连用时,要用单数形式。如:
five hundred people五百人
two thousand books两千本书
many million trees几百万棵树
(2)表示不确切的数字:概数词加-s+of+可数名词复数,且前面不再加具体数字。如:thousands of factories成千上万家工厂
考向四 分数
用英文单词表示分数时,一般情况下,分子用基数词,分母用序数词,当分子大于一时,分母须用序数词的复数形式。
●1/2: one half, a half (不读作one second)
●1/3: one third或a third
●2/3: two thirds
●3/4: three quarters或three fourths
●2/5: two fifths
提升训练
1.The girl living on the ___ floor often helps old people clean
their rooms and hears them tell old stories.
A.five B.fifth C.fifths D.fifteen
2.There are ___ people planting trees in the park, because
spring is the time to plant trees.
A.three hundreds B.three hundred of
C.hundred of D.hundreds of
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3.Ben is a hard-working writer. He wrote his fifth novel when
he was___ years old.
A.fifties B.fifty C.fiftieth D.the fiftieth
4.According to the survey, nearly ___ of the students in our
class come to school without having healthy breakfast.
A.two fifth B.two fifths C.second fifth D.second fifths
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