备战2022年高考英语二轮复习专题16-数词课件（12张）

(共12张PPT)
数词主要包括基数词、序数词和分数词。
基数词是表示数目多少的数词,序数词是
表示先后顺序的数词。分数词由基数词和
序数词构成。
、基数词
1. dozen score. hundred. thousand. million
billion等前有具体数字或 several,afew等
修饰时,一般用单数;它们的复数形式常
后接o短语,表示不确切数目。如:
I make nine hundred dollars a week
i must have mentioned him dozens of
times in my letters.
2.表示年岁时,用“ in one's+逢十的基数词
的复数”,如 in her fifties
3.表示年代时,用“ in the+逢十的基数词
的复数”。基数词的复数若用阿拉伯数字
表示,可直接加s,也可加’s,如 Jin the
1950s/1950s。
序数词
1.序数词前通常要加定冠词the或形容词性
物主代词,如 the third floor, my first visit
to New york。
2.序数词前也可加不定冠词,表示“再一个,
又一次”。如
You really ought to make the most of the
opportunity, because you wont get a
second chance
三、分数词
1.分子用基数词表示,分母用序数词表示;
除分子为1的情况外,序数词都要用复数
形式。
tH 1/3 one third 2/5 two fifths
2.“分数/分数+of+名词/代词”作主语时,
谓语动词的数与名词或代词的数保持
致。如
One third of these jobs are held by
women。
about 50 percent of his work is to design
programmes
四、常见考点
高考对数词的考查主要集中在年龄表达
法、年代表达法、序数词前加冠词及数
词作主语时的主谓一致等。
改错
1. Then, when I was in the five grade, I
fifth
wanted to be a teacher because I liked my
English teacher so much(2019年全国卷
Ⅱ短文改错)