2024-01-30 10:16:39 人气:101
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基数词:“复数”形式(特殊)【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 half② 分子用基数词,分母用序数词。1/3:a third 或 one third③ 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ofscore, 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.序数词:“加or不加”冠词序数前,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 firstfirst of allat first sightfirst and last …