数词“分类”
- 基数词(123456…)“记忆口诀”
- 【0~12】词各异
- 1~12:one,two,three,four,five,six,seven,eight,nine,ten,eleven,twelve
- 【13~19】teen尾
- 十三:thirteen
- 【几十-几】整十ty
- 三十一:thirty-one
- 【几百and几】一百hundred
- 八百二十:eight hundred and twenty
- 【几千and几】一千thousand
- 四千二十四:four thousand and twenty-four
- 【几百万and几】:一百万one million
- 一百万九千:one million and nine thousand
序数词(第123456…)“基数变序数”
- 【123】一,二,三,特殊记
- 第一first、第二second、第三third
- 【>4】基数→序数,从4开始,词尾+th
- 第四fourth、第七seventh
- 【589】5变ve改f,8去t,9减e
- 第五fifth、第八eighth、第九ninth
- 【几十】尾巴ty变tie,后面+th
- 第二十twentieth
- 【几十几】头不变,尾巴变,中加-
- 第二十四twenty-fourth
- 【几十岁】in 数词复数
- 例:in one’s fifties在某人五十岁
- 【年代】in the 数词复数
- 例:in the 1980’s/1980s在1980年/ 1980年代
- 【分数】先“子”后“母”,子“基”母“序”;子>1,母序“复”
- ① 先说分子,后说分母。
- 1/2:a half 或 one half
- ② 分子用基数词,分母用序数词。
- 1/3:a third 或 one third
- ③ 分子大于1时,分母序数词用复数。
- 3/4:three fourths 或three quarters
- 【小数】小数前,读基数;小数点,point;点后数,挨个读
- 小数点前面的基数词读法不变;小数点后的数字挨个读出。
- 例:16.789 sixteen point seven eight nine,0.89 (zero/nought) point zero eight nine
- 【倍数】倍数+原级/比较/最高+as/than/of
- (1)倍数 as 形容词/副词(原级) as 比较对象
- 例:This bridge is three times a long as than one.这座桥比另一个长3倍
- (2)倍数 形容词/副词(比较级) than 比较对象
- 例:This bridge is thre times longer than tha one.
- (3)倍数 the size/lngth/weight… of比较对象
- 例:This bridge is thre times the lngth of tha one.
- 【得分百千万】连“具体数字”,无复数of
- score, thousand, hundred, million等词的用法
- ①与具体数字连用时,这些词通常不用复数形式,后面也没有of。
- 例:About three million workers were on strike.
- ②不与具体数字连用时,这些词用复数,后接介词of 名词(也可单独使用,后面不用of n)
- 例:scores of students;housands of scholars,Milons (of people) are homels.
- 序数前,加冠词;常+the,又一a/an
- 例:It’s the third time I’ve been here.
- 例:I have worn out two pairs of shoes and I need a third pair.
- 序数前,不加冠:所有格,考第一,作副词,习惯语
- (1)序数词前有物主代词或名词所有格
- 例:This Tom’s second vist to China.
- (2)表示比赛或考试的名次
- 例:He was (the) second in the English exam.
- (3)序数词作副词时
- 例:I have to finsh my homework first. Second, we wil deal withis problem.
- (4)在某些习惯用语中,序数词前不用冠词
- 例:at first
- first of all
- at first sight
- first and last …