序数词的用法及功能
英文数词有什么使用方法？
英语数词有哪些用法？
数词分基数词和序数词。基数词表明数量,序数词表明次序。1.基数词的使用方法(1)基数词在句中关键作为主语、宾语、定语、表语、同位语,比如:ThirtyofthemarePartymembers.(主语)---Howmanywouldyoulike?---Three,please.(作宾语) ThenineboysarefromTianjing.(定语) Sixplusfouristen.(表语) Wefourwillgowithyou.(同位语)(2)表明一个实际数据时,hundred,thousand,million一律无需单数在表明一个不确定性数据时则用单数。比如:Ourcountryhasapopulationof1,300millionpeople.Therearethreethousandstudentsinourschool.Afterthewar,thousandsofpeoplebecamehomeless.Maizeisthemostimportantfoodcropformillionsofpeopleintheworld.Theyarrivedintwosandthrees.(3)表明“……十”的数词的复数形式可以用来表明人年纪或时代,比如:Heisinhisearlythirties.Hediedstillinhisforties.Thistookplacein1930s.(4)表明时时刻刻用基数词。比如:Wegetupatsix.Theworkersbeginworkateight.表明“几个方面过一些”,用代词past,但须在三十分钟之内。比如:tenpastten,aquarterpastnine,halfpasttwelve表示“几个方面差一些”用介词to,但成绩须在三十分钟之上。比如:twentytonine,fivetoeight,aquartertoten表示“几点几分”还可以直接用基数词。比如:sevenfifteen,eleventhirty,ninetwenty2.序数词的使用方法(1)序数词关键作为定语,前边得加定冠词,比如:Thefirsttruckiscarryingafootbaskets.Johnlivesonthefifteenthfloor.(2)序数词有时候前边能加不定冠词来表明“再一”,“又一”这种含意,比如:We'llhavetodoitasecondtime.ShallIaskhimathirdtime?WhenIsatdown,afourthmanrosetospeak.(3)由好多个序数词和基数词在拼读时不相匹配,非常容易填错,应需注意。他们是:one---first,two---second,three---third,five---fifth,eight---eighth,nine---ninth,twelve---twelfth。(4)表明年,月,日时,年用基数词表明,日用序数词表明。比如:1949年十月一日读作:October(the)first,nineteensixty2004年九月十日读作:September(the)tenth,twothousandandfour(5)表明成绩时,分子结构用基数词表明,分母用序数词表明。分子结构超过1时,分母加-s。比如:threefourths,onesecond,wofifths(6)序数词有时候用缩写形式: first→1st,second→2nd,third→3rd,fourth→4th,twenty-second→22nd