高中英语语法专题复习课件--数词(共14张PPT).ppt

1、1.基数词、序数词和分数词的构成及基本用法。2.数词作主语时的主谓一致。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。一、基数词1.hundred,thousand,million,billion,dozen,score等前有具体数字或several,a few等修饰时，一般用单数。它们的复数形式后常接of 短语，表示不确切数目。e.g.This vase is worth several hundreddollars.There had been dozens of attempts at reform.2.表示年岁时

2、，用“in ones+逢十的基数词的复数”。e.g.in his forties。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。e.g.in the 1980s/1980s。二、序数词1.序数词前通常要加定冠词the或与形容词性物主代词一起使用，在句中可作主语、宾语、定语和表语等。e.g.the third chance,my first language 2.序数词前也可加不定冠词，表示“再一，又一”。e.g.She could not go through that a second time.三、分数词1.分数词是由基数词和

3、序数词构成，分子用基数词表示，分母用序数词表示；除了分子为1的情况下，序数词都要用复数形式。e.g.1/3 one third；3/5 three fifths。2.“分数/百分数+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一致。e.g.Two-thirds of her spare time is spent on housework.80 percent of the houses were damaged in the big earthquake.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。【考例】Take

4、the lift to the _(第十)floor,and you will find the gym.（陕西2014单词拼写）tenth 根据括号内的汉语提示补全下面句子。1.Adults catch real flu about once _(每五年),scientists calculate,based on a field study.2.There were a million people in Lahore in April 1948,_(他们当中五分之二)were housed in camps.every fifth year/every five yearstwo-fif

5、ths of whom3.The science editor of The Daily Telegraph has published _ _(几千篇)his articles since 1996.4.Early _(在二十世纪七十年代)no one had any idea that the woman would become a millionaire by planting flowers.severalin the 1970s/1970sthousand of5.My grandpa looked quite healthy though he was _(七十多岁了).6.When the computer failed _(又一次),he drilled holes near the fan to help it cool faster.in his seventiesa second time